1953 m38a1 cdn

[Ed Storey]

What Brian outlined for CFR numbers was the intent when the system was first devised. Since the 1970s this well defined numbering system has changed a bit as older fleets of vehicles were retired and new ones brought into service.

As Rob stated Centurion and Ferret X digits began with 8

Looking at some of the other armoured vehicles:

Leopard X digits beginning with 1, 6, 7 and 8
Coyote X digits begin with 3
M113 Series X digits begin with 3
Lynx X digits begin with 3
LAV III digits beginning with 0, 3 and 4
AVGP Series X digits began with 3
RG-31 X digits beginning with 3 and 8

Softskin vehicles:

M151A2 X digits began with 0 and 2
Chevrolet CK20903 Series began with 2
MLVW Series X digits begin with 1, 3, 5 and 6
5 ton Series X digits began with 0, 1, 2 and 6

Maybe it is me, but it looks the original ordered system has changed.