John Van Veen
He was the primary guide in helping source material for this project and also contributed access to his clocks and extensive editorial guidance.
Edgar Garcia
His collection and guidance, as well as his review of the research, have been incredibly valuable to the project.
Igor Ivanyk
His collection and website, chess-clocks.at, laid the foundation for a substantial portion of the research behind 64 Relics.
Eduardo Bauza
He contributed a number of Argentine chess clocks that materially broadened the known record and brought previously unknown examples into the project.
Holger Langer
His website, chess-collection.de, proved especially valuable when researching some of the rarest chess clocks documented by 64 Relics.
Martin van der Hidde
His original research into the Kallisto chess clock was necessary to document that unusual Dutch electric-analog clock properly.