A Solothurn Horological Brand
Solora was a Swiss horological name associated with Solothurn. A documented chess-clock example dates to 1946, placing the type among the early postwar Swiss clocks.
Miniaturization
The clock's defining feature was its use of wristwatch- or pocket-watch-sized mechanisms rather than ordinary alarm-clock movements. Those units were set into a precisely cut wooden block and controlled through red buttons, a T-shaped lever, and a slider bar.
International Distribution
After the war, Dutch dealer H. Koopman sold Solora clocks when German movements became difficult to source. Some examples therefore carry Dutch commercial associations even though the clock itself was Swiss-made.
High-Level Use
Collector and institutional sources connect the style with major events including the Piatigorsky Cup and report other elite appearances. The clock was not merely a miniature curiosity; it became accepted tournament equipment.
Historical Significance
Solora shows Swiss horology refining the chess clock rather than reinventing it: smaller, quieter, mechanically elegant, and easy to distribute internationally.