Just had this come in, a late 70's Tissot Navigator divers watch with pepsi bezel & 2481 mov't.
Not sure of the age, as it's from around when Tissot stopped using serial no's, but guessing late 70's?!! Looks in great condition, has a screw down crown & bezel 'clicks' nicely. No original bracelet, but I'd probably change it to leather anyway!!
Thanks for looking