Everyone will have a slightly different take on value depending on where they live and how they evaluate the watch. Also, the photos don't really allow an accurate evaluation of the condition. But as a rough guess, I'd put the value in the $500-$750 USD range, but that's just my opinion. That would be for a private sale between collectors of an unserviced watch. Obviously, it would cost more in a retail environment, so if you wanted to insure it, it would be for at least $1k.