Hi, I am back !
It's very interested !
I was wrote about 73' to 74' S/N.
The bass has mustache shaped tail, PF-5 pre. and gripped A logo.
So the bass S/N will fit late 73' (around 40) to early 74' (but 74'-48 has PF-6 !).
The Movie said 74'-643, but 643 is 77' range.
I think about S/N 643, it was miss stamped 64 or 63 or 43 (We know another 73'-43 on Showcase).
Another case, I only know S/N 78'-2001 by request. If the first owner wanted the No. 643 ?
And more, He may wanted PF-5 spec at 1974.
I can only said the bass is good looking, nice sound, great example bass !
Eiji