|Lancia armoured truck, c.1921|
My suspicions aroused, I went back and checked my measurements, and it is indeed smaller than it should be — it's about 1/116 scale, not 1/100. Bugger!
Well, it was an easy error to fix, and I've re-scaled the models now so they're actually the right size.
I feel like it should have some stirring revolutionary slogans painted on the side though.