According to a phone call to the Heritage plant, Heritage serial numbers
started with the letter ‘A’ in 1984, and have continued to advance by one
letter every year thereafter. So:

A 1984
B 1985
C 1986
D 1987
E 1988
F 1989
G 1990
H 1991
I 1992
J 1993
K 1994
L 1995
M 1996
N 1997
O 1998

 

Buy the Book!

I cleaned up my tab for Sonny Boy's Help Me and made it into a short book. There's a Kindle version for 99 cents, and if you buy the paperback you get the Kindle free.

Playing "Help-Me" In the Style of Sonny Boy Williamson II: A step by step, note for note analysis of some of Sonny Boy's Signature Riffs