Now that the adjustable clasps are out, it's easier than ever to put a solid bracelet on your Seamaster 300 or WatchCo version. Source a 1998/840 bracelet or perhaps a 1998/849 if you like, and add the long adjustable clasp with the wetsuit extension as detailed elsewhere. No need to change end-links on a 1610/930 any more! Tom
If you want another more period correct option, Bill Mahoney sells a nice aftermarket flat-link over on Chronotrader: http://chronocentric.com/forums/chronotrader/index.cgi?md=read;id=113828
I prefer the hard way. Scour the planet for old JB Champion's and piece them together. High quality. Solid links. None of this light weight fold over crap AND period correct.
Sorry Tom - had thought about that this am. I grabbed from one of his ads to show, but realize Bill often uses actual shots. Lovely watch and nice looking combo!! Apologies for any inconvenience.