Hey Austin,
great, I've just updated my little site
http://www.hang10.de/mosrite-ventures-2-serial-numbers/. Thanks for the info.
35 slabs so far (without Johnny Ramone's black/black), 22 of them with serial number. And thanks to two discoveries in Japan (B080 and B09x) the gap between B052 and B101 seems to close...

Speaking of Johnny's black slab with black neck and headstock: Does anyone have some info about that guitar? Johnny's played it as backup guitar between around 1978 and 1982 and it looks quite different from all other slabs – I guess it's not a real Mosrite. But who made it, and where is it now? Here's a good picture (live San Francisco '78, photo by Chester Simpson):

(from
http://cretin-family.tumblr.com/post/42222678709/zombiesenelghetto-ramones-san-francisco-photo – thanks!)
R.I.P. Johnny – nine years now...
Cheers, Max