A 1973 Launch
Torn-Uret was advertised in 1973 through Skånes Schackförlag / The Chess House. The product was presented as a proven chess clock with a new appearance and name.
First Generation
The original Tower used a wooden case and a full-width pushbar with German Junghans W.783/J250 movements.
Second Generation
By 1976 the case had shifted to molded Bakelite or plastic while the full-width pushbar remained. The movements changed to PA-caliber mechanisms supplied through Peter-Uhren and associated with JAZ.
A Swedish-Danish Commercial Network
Stellan Persson and associated businesses operated across Malmö and Copenhagen. Contemporary advertising explicitly called Tornuret a Swedish quality clock even though its mechanics came from continental suppliers.
Tournament Use
The plastic Tower became common in Swedish chess and appears in major events including the 1983 Tal–Andersson match and a later form at the 1989 Karpov–Kasparov World Cup event in Skellefteå.
Historical Significance
Tower is the clearest mature expression of Sweden's hybrid model: national design and chess-market identity without insistence on nationally manufactured movements.