[Jon S.]

When a '70's Artist (pre-Musician) has a serial number beginning with "B," does that mean it's a "second?"

[broesau]

As I recall the letter at the beginning of the serial # refers to the month the guitar was made: A - January, B - February, etc.

[Tennessee Jedi]

http://www.noahjames.com/vintagepage/musician.html
Linky Link to some Ibanez guys....
Lots of info

[Jon S.]

Excellent link, thanks, T-J!

P.S. Are they all 9-11 lbs. heavy?

[Tennessee Jedi]

I play a Musician and it is heavy.

Built Tonka tough !

[mkaufman]

First letter designates month, then the next two numbers designate year.

ie: B78 - Feb '78.

Those vintage Ibby's are great guitars...lots to choose from.

mk