Vintage Gold Constellation 18 K cal 711

Hi guys!

Need help! what is this version name and how much could it worth ? I want to sell it but do not know how much to ask!

Possibly this reference: (http://naligazone.com/index.php/data-watch/omega/13-watch/omega/695)
Constellation
Gents' metal bracelet
Reference
BA 351.0013
International collection
1974
Movement
Type: Automatic (mechanical)
Caliber number: 711
Created in 1964
24 jewels
Some of these calibers were chronometer certified ones.
Functions
Chronometer
Case
18K solid yellow gold
Case back
Press-in
Dial
Smoked "4 sectors" or solid yellow gold.
Crystal
Scratch-resistant sapphire
Bracelet
18K solid gold (soldered)
Water resistance
No
This watch may have existed with different dials.
More product information
Watch head ref. = 8354
Case : rectangular (29,7 x 47 mm) with "rounded rectangle" dial opening, 18K solid yellow gold.
International Collection : 1974-1975
Swiss retail price (1974) : CHF 5'040.-

Current value? Probably value of the gold x 110%. This model is not highly sought so you would be difficult to command high premium over Gold content.