1st digit= Make
G- MG
2nd digit= Engine Type
H- BMC B-Series engine, 1.8L (MGB)
A- BMC A-Series engine (Midget)
3rd digit= Body Type
N- 2 seated Roadster
D- GT or Coupe
4th digit= Series
3- Mk1 (1962-1967)
4- Mk2 (1968-1969)
5- Mk3 (1970-1979)
5th digit= Market
U-USA Left-hand drive
L-Left-hand drive
R-Right-hand drive
6th digit=year
Model Year
None-1968-69
A-1969-70
B-1971
C-1972
D-1973
E-1974
F-1975
G-1976
H-1977
J-1978
L-1979
7th digits= Car Number
Makes yours a:
MGB, "B" series 1800 engine, 2-seat roadster, Mk1 (1962-1967), Left-hand drive, but where you have a blank in your VIN, should be another letter indicating actual year, or, if none, 68-69.