CMP C60 chassis number?

[John Carmichael]

I then looked at the number stamped on the chassis frame which looked like 43035W1S1923 and got another AI hit.
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The Chevrolet CMP (Canadian Military Pattern) chassis number 43035W1S1923 decodes as a vehicle built in 1943.
Chassis Number Breakdown
The number structure follows the general format for GM of Canada CMP chassis serials, typically including the model year, model number, and sequential serial number.
• 4: Indicates the model year of manufacture, 1943.
• 3035W1: This segment likely denotes the specific vehicle model type (e.g., C15A, C30, etc.) and potentially a plant or contract code. Australian-produced Chevrolet CMPs often had numbers stamped on the left chassis rail.
• S: Could be a plant code or a further model variant indicator.
• 1923: The sequential production number for that specific model type within the production run.
For more detailed information or to connect with other enthusiasts, you may find the Maple Leaf Up Forum a valuable resource, as they specialize in the specifics of these historic military vehicles.

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Maybe a useful clue too?