the backwards 6 thing is a "G". info from the CalVIN web site is as follows:
Model: Land Rover, Series IIA
Body type: Basic
Wheel base: 109in
Engine: diesel
Model years: 1962-1971
Destination: Completely knocked down (CKD), right-hand drive (RHD)
00373 Serial number
G Design: Six significant design modifications
Suffix used from April 1969 till October 1971

