1970s Omega electric F300 Hz, Geneve Chronometer, ref. 198. 013
These electronic Omega f300 models are also known as hummers, thanks to the distinct noise the tuning fork makes. This is reference number 198.031.
Case diamensions:  38mm x36mm
12mm depth 
42mm lug to lug
 
CONDITION
Omega f300 watches use much of the Bulova technology from their hummers, so much so that the inside of the case back acknowledges Bulova’s patents. It is clearly a case of ‘if you can’t beat them, join them’. The Omega 1260 / ESA9164 12 jewel movement is working perfectly, including the day and date calendar which can sometimes be an issue. The dial is very good, and the crystal is an Omega original one. The case is free from significant scratches, and overall this is a very nice example. The 19 mm leather strap is new.