I've never seen one of these early Joe Maphis model singlenecks with one of the flip-up mute "Guild" vibramutes, they all do have the earlier more primitive vibrato, with the mistake plate. BUT I have seen two of the '62-'63 era Joe Maphis model DOUBLENECKS that had the flip up mute style vibramutes, including the one I used to own (picture below). So I guess that's where I was basing much of what I was saying. Not entirely accurate, but man, all this stuff can get so darn confusing.
Main thing to point out, of course, is that the 1961-1962 Joe Maphis model singlenecks had the same body shape that would eventually become the Ventures models.
Deke
