What is the date of a guess watch serial number G85386G ?

Copy from Hong Kong by the looks of it.

Gucci Watch 990333 paris Stainless Steel Back retailed $350

https://www.ebay.com.hk > itm
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???? ; Watch Shape: Square ; Features: Date Indicator, Water-Resistant ; Case Finish: Brushed ; Case Material: Stainless Steel ; Reference Number: Ya131302.
Watch Shape: Square
Reference Number: Ya131302
Case Finish: Brushed
??: ??: ????????????????...

and how to spot fakes

https://www.google.com/search?q=Gucci+watch+serial+number+990333

..

if you can't see it on the back, it's probably inside the back cover.

Guess might be rather hard to find a Bulova watch with that particular serial number. Did you try ebay?


Bulova Precisionist Wristwatches eBay


Vintage Bulova Watch


Relojes eBay Ebay Money Maker Sold Watch 285 00 Update Bulova Accutron Spaceview Watch

Mabe these links will help.
R574371 was made in1987
Rolex Production Dates by Serial Numbers Look Up Tool Chart

https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1GGGE_enUS385US385&ion=1&espv=2&ie=UTF-8#q=how%20do%20i%20tell%20if%20my%20rolex%20is%20real

This model Rolex has been manufactured over multiple years, and it is not possible to date your watch based purely on is model number. However, it is possible to date most Rolexes based on their serial numbers, which can be found stamped between the lower lugs (i.e., the lugs below 6:00 on the watch dial). You will need to remove the band from these lugs to read the serial number.

Dating the watch case of a Rolex does not necessarily date the entire watch. It is possible that a movement from another watch was placed into a watch case that is younger or older than the the movement. Like Rolex watch cases, Rolex movements can also be dated by their serial numbers, if this is a concern you have about this particular watch.

This jeweler has put together a nice summary of when Rolex watch models were introduced and which serial numbers are associated with specific years of manufacture. Once you have found your serial number, this should help you date your watch. I have no connection (financial or otherwise) with this web site, but I found the information useful and presented in an easy to understand way.

http://www.bgrayjewelers.com/rolex_information.htm

We cannot tell you from the serial number what the model watch you bought is . But you can call Citizen watch 800 321 1023 extension 4234 and give them the serial and they will be able to tell you the model and year the watch was produced.

I would expect Rolex to have a record of all their watches and if you contact your nearest dealer, they should be able to help you.

You can find a store guide on their web site "rolex.com"

Date setting should be described in your manual but if you do not have it, then you can get another copy by going to their web site "modaine.com".

Select "after sales service" and a list of instructions appear. This list claims to cover all the watches they make but doesn't include the model number you quoted. Could it be that the number was the serial number for the watch?

The manual list is not too long, so it should be possible to down load the most likely looking candidates.