Today I found this interesting link hope you people like this. Its an Army vehicle registration books on the Australian War Memorial website. I think it's only for the Australian region.
It contains
- Army Registration Number (ARN)
- Type and make
- Engine number
- Chassis or maker's serial number
- Details of changes to registration
- Details of eventual disposal of vehicles.
https://www.awm.gov.au/collection/C1424610