Chassis I.D. number

[Jim Algar <JamesA@hi-torque.com>]

Here's one for the truly obsessive among us:

My '69 Sprite Mk.IV carries the following Chassis I.D. #:
H-AN9U-79140 G

wherein:
H - Austin Healey
A - Engine (A series)
N - 2-seater
9 - Series (Mk.IV)
U - USA (left hand drive)

79140 - Serial Number (build date sometime after Dec. 1968)

G - ??????????

And that's the question; none of my references mentions a
trailing letter suffix or what it might mean.

Anybody?


Regards,
Jim Algar