Wakmann did numerous versions of this watch. With that said, this particular version, the blue dial with the Wakmann signature, is quite a rare watch. There’s also a very similar black version which is common and would often pop up on several marketplace. These were probably mass produced at some point around the late 60’s or early 70’s just as the quartz crisis is starting to set in. It has a chrome case which is indicative of a low cost alternative and might have even be one of the models that are affordable at the time. Affordable is a double edge sword in a way since not very many of them would survive in the future because of the materials used. That said, it is a perfect incredient for collectors because of its scarcity… More at Rue Watches.
Very difficult to find, but possibly the most perfect watch I have ever seen.