1974 Derby Swissonic jump hour and jump minutes with vertical drum display powered by Swiss ESA 9176 transistorized electromagnetic module while the roller on the balance moves an escapement wheel ...
When digital meets mechanical; the original design, Jaz Derby. Perhaps I should show a photo of the mechanical m… | Vintage watches, Digital watch face, Buy watches
JAZ, Derby Swissonic
FS: DERBY SWISSONIC JAZ JUMP HOUR FROM MID 70s with original bracelet! | WatchCharts Marketplace
Rare Jaz Derby Swissonic ESA 9176 jump,flip watch,Great condition!!! electric | eBay
jaz derby swissonic watch NOS vintage led Jump Hour Speedometer 1970 rare | #245188802
Jaz, Derby Swissonic, circa 1974. An interesting gold-plated watch with... in Monaco
VanBed - 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
JAZ DERBY SWISSTRONIC Metal bracelet watch Quartz move… | Drouot.com