Hi guys - through what I can only characterize as a stroke of good fortune, I recently acquired a barrel-case Carrera from circa 1974 that by all appearances is legitimately NOS. I bought it via a long-time watch dealer in Switzerland that shuttered its doors a while back due to the owner's passing, and I gather he was a Heuer AD back in the day. Click here to see some photos of the watch: https://goo.gl/photos/EfFe5g6v2Bc2XRpu6

The only vague sign of wear on it is on the clasp, which has an unusual "slide" mechanism I can't recall ever previously seeing; it has a barely visible amount of wear, presumably from people trying it on (myself included).

While I'm a long-time collector, my Heuer-specific expertise is somewhat limited, and this is definitely the first time I've ever come across an NOS watch that's over 40 years old! Remarkably, it still runs and keeps good time, though its top chrono button appears to be jammed. I'm not interested in keeping the watch, so I'm curious to hear opinions on what I should do with it. Should I get it serviced before anything else, and if so, do you guys have any recommendations for vintage Heuer specialists? (I have my "Omega guy" and "Rolex guy," but they work exclusively with those brands.) Also, I know it's not one of the "classic" Carrera references and has the clearly-'70s-vintage barrel design, but how does one go about establishing a valuation for such an item? Should I contact one (or more) of the auction houses? Thanks in advance for any suggestions you might have!