[DavidG]

The surviving engine production figures in the Benson Ford Research Center for the '32 model year are among the most detailed for any pre-WWII model year. The entries in the Rouge engine log are in many instances daily. There are AB, ABF, B, and BF prefix entries for the fours and 18 and 18F prefix entries for the eights. All of which were the prefixes of '32 model U.S. VINs and those of U.S. exports. (An additional B was added to the fours' prefixes when the engine was destined for a big truck and BB was added to V8s' prefixes for that purpose.)

The first batch of Canadian fours' full prefix was either CBG and CBGF; the second and last batch prefixes were CBQ and CBQF. The letter D does show up in the prefixes of the first batch of Canadian V8s, but not at the beginning. Rather those prefixes were C18D and C18DF (the second and last batch were prefixed C18R and C18RF).

Could a Canadian frame have the first two letters missing from the prefix? It's a possibility, although a real long shot. Even if that were the case, the frame would be a mid-year run-of-the-mill version and have nothing unique about it other than missing a letter and two numbers in the engine number (VIN) prefix, given the delay in Job #1 on the south side of the Detroit River compared to Job #1 on the north side of the river in Dearborn.

You should satisfy yourself and visit the Benson Ford Research Center. What they have in Ford's archives regarding '32 engine production and serialization is not available on line.