Close to AWCO is also HP Horlogerie (Elandsgracht). Not that interesting. At the end of that street is the Looier which is an antique fair which has some watches as well (corner Lijnbaansgracht and Elandsgracht). Spiegelgracht is a gold buyer which watches as well but does buy watches. Nice (and decent) guy but don't expect much small talk. Anyway: nicest of them all is AWCO. Rest are really just traders. And to be honest: I can't think of 6 shops which sell vintage watches in Amsterdam. 2-3 and some loose watches in shops that's it.