This vintage 1960’s DERBY SWISSONIC JAZ direct read digital is simply the coolest. This watch is electronic and operates like the old clock radios; whereby the numbers flip over via a turning transistorized drum machine. The case measures 35x41x16mm. with some marks on the case, but nothing detracting. These watches are becoming VERY hard to find; plus, are very uncommon to find operating perfectly. This watch was serviced properly and runs like a charm.