chess clock
chess clock is a game equipment or clock.
Also recorded as game clock.
Overview
Its recorded use is chess. Catalogue entries for watches state calibre, reference, case and bracelet, and accompanying papers. VALÉORINE records this subject so that lots referring to it can be described consistently.
In detail
two adjacent clocks with stop/start buttons
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Chess clock”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q831765: chess clock
Consult the source