This New Old Stock (NOS) Eterna Sonic is a high quality electronic watch, in remarkable condition.  Model reference 487 T.


From the serial number on the case back we can accurately date this watch to being made in 1969.  The Eterna Sonic range was launched in 1970, and ran until 1975, so this would have been a very early one in preparation for the launch.


If you want a ‘hummer’ electronic watch then you will struggle to find a more original example.  This Eterna Sonic still has the orignal strap and buckle fitted, and the remains of the case back sticker is still there too.  The case is 40 micron gold plated, whereas many good companies used 20 micron or even 10 microns, and apart from the lightest surface scratches is in remarkable shape for a 50+ year old watch.  The worse marks are a 2mm scratch on the bezel near 12, and some tiny pin head dents on the not crown side.  Inside this case is an ESA 9162, albeit branded Eterna-Sonic 1550, and that is the same movement you find in all the higher quality electronic watches.  ESA licensed the technology from Bulova in 1968, which is acknowledged inside the case back and on the movement itself, and then made versions for different manufacturers.  Omega f300, IWC Electronic, Tissot Tissonic and Longines Ultronic are among others that all used the same movement, just badged slightly differently for each brand.  Not all finished the movement with Côtes de Genève striping like Eterna have here though.   We will install a brand new battery before sending the watch out to the new owner.  The glass has some very small marks, but not enough to warrant changing.  The glass isn’t signed like acrylic ones are, but the crown is signed.

This watch will be supplied with our branded 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 and should not be used without permission.


Width with crown  38.3 mm

Width without crown  36.6 mm

Between lugs  22 mm

Lug to lug length  40.3 mm

Case Thickness  11.7 mm

All sizes are approximate.  The watch is photographed on a wrist of 190mm/7.5 inches.

Included with this watch is a 3 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.

From 1st September 2021 we will be planting a tree for every watch we sell, working with the International Tree Foundation (Est 1922) to make this business positive on carbon.  By buying anything pre owned you are effectively reusing what already exists, but this takes it further and makes us feel good.