DOXA (Swiss) by Synchron SA SUB 300T ‘Divingstar’ Diving Watch – 17j ETA Cal. 2783


1 in stock

From the mid-1970’s an exceptional ‘Sharkhunter’ SUB 300T diver from DOXA’s (Swiss) Synchron SA era, that has been professionally inspected by Localtime.

It is not often one sees a full set Doxa SUB, including box, leaflets hang tag and straptool. As a matter of fact its the only set I’ve seen … and I’ve seen many Doxa’s! A stunning ‘Divingstar’ SUB 300T diver from DOXA’s Synchron era, it has been professionally and fully serviced by Localtime.

The large C-Type stainless steel case is in excellent unpolished condition, houses a Doxa Cal. 58 (ETA Cal. 2783) with date and measures in at 42mm or 45mm including the crown at 3h. The signature yellow dial, set of 3 hands and bezel are simply stunning. It is wearing its own BOR ‘Expandro’ bracelet. I have included many photos of the watch, snapshots from the service bench, but also some closeup snapshots I took just for fun and also to allow you to enjoy the lovely details of this fine timepiece.

As with all the watches that are handled by Localtime, the BIN price includes a written 6-month written warranty from the date of purchase. Feel free to contact me for any questions you might have.

Try my Localtime ladder-style straps (last photo, listed separately under ‘Accessories & Straps’.

Important Note: Sometimes I am asked what I exactly mean with ‘professionally inspected by Localtime’. Here is my theory on vintage watches: as a purveyor of vintage watches, my effort is to always do only what is needed to the watch. I do not buy ‘junk’ watches to resell. I am choosy with my purchases and always sell watches that are, to my knowledge, authentic and in good condition. I first inspect the watch, both visually (cosmetically) and then mechanically. If I judge that the watch is not yet in need of a full service then I do not put the watch through a service which, by the way, entails a lot of risks too. Instead, I give it what I call my ‘Spa’ treatment which will include a cleaning, changing of gaskets, oiling, lubricating and mechanical testing. If the plexi is heavily scratched or discoloured and it can not be cleaned, I change it. If the crown is wrong or worn, I also change it. Now, if the watch is in need of a full service, then my ‘professionally inspected’ description becomes ‘professionally serviced’. In both cases, I include a written warranty with my buy it now price and I always describe what I have changed, if anything, on the watch.

Important Note On Straps/Bracelets: The straps I use on my watches (leather, canvas, suede, rubber) are always brand new, unless otherwise mentioned and, in most cases, I also sell them separately in my store, in different colours and sizes. In the case of metal bracelets, if the watch is NOS, the bracelet is also unused. If the watch is pre-owned with its original bracelet, then the bracelet is also pre-owned, unless otherwise mentioned. Either way, if in doubt, please ask.


DOXA (Swiss)

Production Period



'Divingstar' SUB 300T


Time, Date, Elapsed Time & Decompression Bezel




17j Doxa Cal. 58 (ETA Cal. 2783)

Case Material

Stainless Steel

Case Back

Stainless Steel

Case Size

42mm case, 45mm including crown at 3h

Lug Width



Pre-Owned & Working With Warranty

Last Known Service

Serviced by Localtime – September 2020


Free Worldwide


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