This Avia Swissonic will tempt many electronic watch collectors due to the condition and funky 1970’s shape.
HOW DO WE DATE THIS WATCH?
The ESA 9154 movement inside this watch was made between 1970 and 1975. In 1970 it was the first movement to use a balance and a transistor, and by 1975 this technology was outdated – things moved fast in the 1970s! We have picked a mid date of circa 1973 for this watch.
The transistor switched mechanisms were a half way house between traditional mechanical movements, and quartz watches. They are not hummers, like the Bulova Accutron or Omega f300, but these tick at 28.8kbph. The battery powers the transistors, that act instead of pallet forks to regulate the beat of the watch. You can read more about the technology here.
The watch is running very well, and we have changed the battery for the correct Renata 344. The red second hand sweeps round nicely, and the gold plated case is in very nice condition. The only real negative is the crown has lost some plating. The dial is very good, and the extra long leather strap is new and could be swapped for a different colour if required.
This watch will be supplied with a presentation box and our Certificate of Authenticity.
Please see the HD video for more detail. All photos and videos are part of the description and are of the actual watch unless mentioned. We do not photoshop any pictures, and the images are copyright of birthyearwatches.com and should not be used without permission.
Width with crown 40.5 mm
Width without crown 38.2 mm
Between lugs 20 mm
Lug to lug length 41.7 mm
Case Thickness 11.5 mm
All sizes are approximate.
Included with this watch is a 1 month guarantee and free delivery to UK addresses. If you live outside the UK we can still deliver to most countries. Please see our Worldwide Shipping information, or Contact Us. Payment can be made by most credit or debit cards, bank transfer or PayPal.
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