The right hand one appears to be a late sixties 166.0027 with bracelet. If it is, it's probably the more valuable of the two so, the one to sell (and you prefer the dressier watch anyway). Depends on its overall condition which you can't tell from that photo but 500-1000 of whatever currency is local to you. Have a look on eBay at finished sales. Here's one to start you:
Hope this helps, Chris
Edited by a mod Jun 1, 2023