Inherited TAG HEUER Professional 200metre Divers watch

Hello Everybody, my name is Pete and I am new to this forum. I hope there are some knowledgeable members who can help me.
I now own a TAG HEUER divers watch, the watch is finished in satin finished stainless steel, it has a blue face which incorporates a square date window, the face also shows the TAG logo signature, the word Professioal and 200 metres appeares in the lower section of the face, a calibration bezel surrounds the glass.
The rear plate again has the TAG logo embossed on the face, two numbers are shown below which I believe may be the model and serial numbers SV6714 and WL121F.
The general condition is very good with no visible damage or wear, time keeping is excellent since setting time before Christmas. Any information regarding approx age and value would be very much appreciated.

Well based on the model number, WL121F, it’s a Tag Heuer Kirium, but that doesn’t determine the size.

Strangely the serial number referenced on your inherited watch was sold at auction on 22-12-17........

“TAG HEUER KIRIUM MID-SIZE QUARTZ WATCH. THE WATCH FEATURES A STAINLESS STEEL CASE, A BLUE DIAL WITH LUMINOUS HOUR MARKERS AND A STAINLESS STEEL BRACELET WITH FOLD-OVER DEPLOYMENT CLASP - ADDITIONAL DETAILS: 38.5MM CASE INC CROWN - SERIAL NO: SV6714 - MODEL NO: WL121F - BRIEF CONDITION REPORT: TIME & DATE CAN BE SET, CASE & BRACELET ARE SCRATCHED THROUGHOUT”

https://www.barnebys.co.uk/auctions...ch-the-watch-features-a-stainless-steel-case/

As for value I have no clue. Condition is everything and it doesn’t look in great condition in the picture from the auction, which will affect its value. I’d suggest you check on eBay at completed sales for an indication of value.