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Sources & working bibliography

64 Relics documents the sources used to support its historical claims, maker attributions, chronologies, and object identifications. The registry continues to expand as new evidence is added.

About the registry

Source numbers are retained so citations used throughout 64 Relics can be traced back to the research record. New sources are added without renumbering earlier citations. Page-level notes are connected to a source registry so readers can trace claims without relying on one undifferentiated bibliography.

  1. 001

    1) https://www.britannica.com/topic/chess

  2. 002

    2) https://ourworldindata.org/literacy

  3. 003

    3) https://ourworldindata.org/working-more-than-ever

  4. 004

    4) https://eh.net/encyclopedia/hours-of-work-in-u-s-history

  5. 005

    5) https://en.wikipedia.org/wiki/Factory_and_Workshop_Act_1878

  6. 006

    6) https://www.presidency.ucsb.edu/documents/proclamation-182-eight-hour-work-day-for-employees-the-government-the-united-states

  7. 007

    7) https://exhibitions.lib.umd.edu/unions/labor/eight-hour-day

  8. 008

    8) https://eh.net/encyclopedia/hours-of-work-in-u-s-history

  9. 009

    9) https://ourworldindata.org/working-more-than-ever

  10. 010

    10) https://www.cambridge.org/core/journals/jou rnal-of-economic-history/article/abs/working-hours-of-the-world-unite-new-international-evidence-of-worktime-18701913/C0DC697550617249A2C5F90DB7202F19

  11. 011

    11) https://en.wikipedia.org/wiki/Paris_in_the_interwar_period

  12. 012

    12) https://en.wikipedia.org/wiki/Eight-hour_day_movement

  13. 013

    13) https://www.nber.org/system/files/working_papers/h0036/h0036.pdf

  14. 014

    14) https://www.measuringworth.com/datasets/ukearncp i/earnstudyx.pdf

  15. 015

    15) http://piketty.pse.ens.fr/files/Feinstein1998.pdf

  16. 016

    16) https://www.britannica.com/topic/chess/The-time-element-and-competition

  17. 017

    17) https://chess-teacher.com/origin-of-chess-clocks/

  18. 018

    18) https://archive.org/details/TheOxfordCompanionToChessFirstEditionByDavidHooperKennethWhyld

  19. 019

    19) https://docs.iza.org/dp6988.pdf

  20. 020

    20) https://watermark02.silverchair.com/jrsssa_71_1_207.pdf

  21. 021

    21) https://www.stlouisfed.org/open-vault/2025/aug/primer-discretionary-income

  22. 022

    22) https://museum.fide.com/exhibits/fattorini-chess-clock

  23. 023

    23) https://www.lukehoney.co.uk/blogs/note-from-luke/118618308-fattorini-chess-timing-clock-1890-s-1904

  24. 024

    24) https://www.britishmuseum.org/collection/term/BIOG199500

  25. 025

    25) https://www.jaqueslondon.co.uk/pages/about-jaques-london? srsltid=AfmBOorOOt5zXJS4qaJ7224vGwL W0BqTpwx5Xx7LG-KG o3Y9otyDPrv4&

  26. 026

    26) https://en.chessbase.com/post/che-clock-for-sale-for-collectors-and-historians

  27. 027

    27) https://www.1stdibs.com/furniture/more-furniture-collectibles/collectibles-curiosities/games/jaques-london-chess-set-made-joaquin-amarro/id-f_815777/#zoomModalOpen

  28. 028

    28) https://chessantiques.com/chess-historical-background-and-articles/british-chess-company-history/

  29. 029

    29) https://www.chess-collection.de/newpage1f80f2e5

  30. 030

    30) https://worldchesshof.org/program/the-staunton-standard-evolution-of-the-modern-chess-set/

  31. 031

    31) https://etheses.durham.ac.uk/id/eprint/12703/1/The_English_School_of_Chess.pdf?DDD17+=

  32. 032

    32) https://www.reigatesociety.org.uk/RR-history/tanner.php

  33. 033

    33) https://chessantiques.com/product/tanner-antique-chess-timer-clock/

  34. 034

    34) https://www.chess-clocks.at/Pages/mf_frame_Tanner.htm

  35. 035

    35) https://clockrepairstudio.com/brands-we-service/enfield-clock-company-history/

  36. 036

    36) https://www.gracesguide.co.uk/Enfield_Clock_Co

  37. 037

    37) https://antiquevintageclock.com/2015/09/27/smiths-enfield-mantel-clock/

  38. 038

    38) https://www.wakimantiques.com.au/product-page/stunning-original-enfield-grandfather-clock-with-hand-carved-case-from-c-1940s

  39. 039

    39) https://www.antiquechessshop.com/product/ref2047-chess-timer-by-sutton-coldfield/

  40. 040

    40) https://collection.sciencemuseumgroup.org.uk/people/cp31792/smiths-english-clocks-limited

  41. 041

    41) https://www.electric-clocks.co.uk/smiths/sm-hist.htm

  42. 042

    42) https://chessantiques.com/product/sutton-coldfield-antique-chess-clock/

  43. 043

    43) https://ahs.contentfiles.net/media/documents/Davies_PhD_Thesis.pdf

  44. 044

    44) http://www.chess-museum.com/german-sets.html

  45. 045

    45) https://archive.org/details/19thCenturyChess/mode/2up?utm_source=

  46. 046

    46) https://en.wikipedia.org/wiki/Deutsche_Schachzeitung

  47. 047

    47) https://www.schachbund.de/referate.html

  48. 048

    48) https://de.wikipedia.org/wiki/Thomas_Haller_%28Uhrenfabrikant%29

  49. 049

    49) https://www.chess-collection.de/newpagefea89af1

  50. 050

    50) https://junghans-shop.com/company/

  51. 051

    51) https://www.chess-clocks.at/Pages/mf_frame_Junghans.htm

  52. 052

    52) https://www.britishmuseum.org/collection/term/BIOG71088

  53. 053

    53) https://chessantiques.com/product/tanner-antique-chess-timer-clock/

  54. 054

    54) https://www.chess-collection.de/newpage25b71bca

  55. 055

    55) https://www.chess-clocks.at/Pages/mf_frame_Jerger.htm

  56. 056

    56) https://www.chess-collection.de/newpage022fd55e

  57. 057

    57) https://www.chess-collection.de/newpage2da2238d

  58. 058

    58) https://www.chess-clocks.at/Pages/mf_frame_Posingis.htm

  59. 059

    59) https://www.chess-clocks.at/Pages/mf_frame_Alpha.htm

  60. 060

    60) https://chess-clocks.at/Pages/mf_frame_Thiel.htm

  61. 061

    61) https://www.chess-collection.de/newpage76

  62. 062

    62) https://www.chess-collection.de/newpage77

  63. 063

    63) https://ostalgieruhla.wordpress.com/ruhla-clocks/ruhla-chess-clock-schachuhr/

  64. 064

    64) https://vamospanish.com/discover/buenos-aires-secret-society-of-sidew alk-chess-players-masters-of-the-concrete-battlefield/

  65. 065

    65) https://ajedrezlatitudsur.wordpress.com/2026/01/03/argentine-chess-milestones-of-world-renown/

  66. 066

    66) https://www.chess.com/blog/ThePawnSlayer/the-infamous-8th-chess-olympiad

  67. 067

    67) https://en.wikipedia.org/wiki/8th_Chess_Olympiad

  68. 068

    68) https://en.wikipedia.org/wiki/Buenos_Aires_1939_chess_tournament

  69. 069

    69) https://en.chessbase.com/post/revisiting-the-eigth-olympiad-in-buenos-aires

  70. 070

    70) https://www.chess.com/forum/view/chess-equipment/the-set-of-the-1939-buenos-aires-olympiad

  71. 071

    71) https://www.facebook.com/groups/970481873152449/posts/1564916433708987/

  72. 072

    72) https://es.wikipedia.org/wiki/Casa_Escasany

  73. 073

    73) https://www.wopc.co.uk/argentina/escasany/casa-escasany

  74. 074

    74) https://www.scribd.com/doc/231492900/206510116-Ajedrez-223-Nov-1972-Ocr

  75. 075

    75) https://www.chess-clocks.at/Pages/mf_frame_ROA.htm

  76. 076

    76) https://escholarship.org/content/qt0s71f0cw/qt0s71f0cw_noSplash_22625b826d6aad8c2769f6e3e401dac6.pdf

  77. 077

    77) https://en.chessbase.com/post/moscow-1925-the-rise-of-soviet-chess-november-10-december-8-1925

  78. 078

    78) https://www.chesshistory.com/winter/extra/capablanca7.html

  79. 079

    79) https://www.imdb.com/title/tt0015731/

  80. 080

    80) https://worldchesschampionship2023.fide.com/chess-champions

  81. 467

    467 — Uhrenfabrik Thomas Haller / Veikkos Archiv. Supports the statement that Haller was producing approximately 4,000 pocket watches per day in 1899 and that the merger/combination with Junghans followed in 1900. Open source ↗

  82. 468

    468 — Faszination Junghans — book excerpt. Key chronology source for the 1900 merger/combination, practical or oral separation in 1902, legal separation in 1911, Thomas Ernst Haller founding the new company in 1902, and Thomas Haller joining it in 1904. Open source ↗

  83. 469

    469 — Mikrolisk trademark database — Haller trademarks. Identifies “H (im Dreieck)” (“H in a triangle”) with Thomas-Ernst Haller AG, Schwenningen; the key attribution source for the mark on the c. 1920s Haller chess clock. Open source ↗

  84. 470

    470 — Sozialgeschichte der Uhrenindustrie — Kienzle history. Documents the 1928 merger of Kienzle and Thomas Ernst Haller in Schwenningen and notes that Thomas Ernst and Willy Haller joined Kienzle’s board after the merger. Open source ↗

  85. 471

    471 — Jewish Chess History — “Clocks” (Oct. 10, 2009). Reproduces and identifies the April 1956 64 Mishbatzot advertisement for “Chess Clocks Made in Israel” by H. & J. Benjamin, 167 Jaffa Road, Jerusalem. Open source ↗

  86. 472

    472 — Kedem Auction House — catalog OL-10 PDF. Comparison source for IDOX / Israel Watches Co. and Israeli-made clock evidence used in the IDOX attribution context. Open source ↗

  87. 473

    473 — Dynasty Auctions — “A desk clock — Hebrew letters instead of numerals — Israel c. 1950s.” Additional mid-century Israeli clockmaking context used when dating the IDOX line. Open source ↗

  88. 474

    474 — “За дешевые шахматные часы” [For Cheap Chess Clocks], 64, 1929, no. 6, pp. 8–9. Supports the 23–28-ruble chess-clock price, 20–30-ruble six-month club budgets, the proposed 7–8-ruble mass-production target, and the call for state or cooperative production. Open source ↗

  89. 475

    475 — British Museum — Hamburg American Clock Company / HAU object record. Company/object and crossed-arrows identification context used in the HAC section. Open source ↗

  90. 476

    476 — Watch-Wiki — Hamburg-Amerikanische Uhrenfabrik. Company chronology used for the Landenberger & Lang / HAU-HAC history and later industrial development. Open source ↗

  91. 477

    477 — Museum.de — Hamburg American Clock Company / HAU guide entry. Additional corporate chronology used for the Schramberg and Junghans-combination timeline. Open source ↗

  92. 478

    478 — Antique Chess Shop — Ref. 3082, chess clock by HAC. Finished-object and printed/catalog evidence for an HAC-type chess clock. Open source ↗

  93. 479

    479 — Antique Chess Shop — Ref. 3082, chess clock by HAC. Rear/interior evidence showing the clock's two separate mechanical movements. Open source ↗

  94. 480

    480 — Watch-Wiki — Hamburg-Amerikanische Uhrenfabrik image-gallery archive. Crossed-arrows HAC / HAU identification-mark context. Open source ↗

  95. 481

    481 — Antique Chess Shop — Ref. 1538, Jaques London chess clock. 1925/26 Jaques price-list evidence separating an HAC-type chess clock (30/-) from the Jaques Congress Timer (70/-). Open source ↗

  96. 482

    482 — Chess-Collection.de — Hamburg American Clock Company / HAC material. Broader HAC chess-clock and international movement-circulation context. Open source ↗