Regarding earlier Volvo model numbering systems, I'll quote Ulysses Everett McGill(AKA George Clooney)in Oh Brother Where Art Thou? "It's a fool who looks for logic in the chambers of the human heart". I understand internal factory numbering of chassis and so forth, but how do we get from 445 to 210 to 220?
Is rampant alchoholism still a problem in Sweden? Oh, well, at least Volvo is pretty good about putting part numbers on everything. Has anyone ever seen a dash clock which was found on the really early (B-16) Amasons*? I once found a chromed handbrake loop on an early car, where the usual one is black plastic.
It's now on my '69 1800.



(that's how they originally spelled it, I've heard)

There's a difference between model number and how the cars are badged.

Model 120 = 4-door sedan (saloon to the Brits)
Model 130 = 2-door sedan (sedan to the Brits)
Model 220 = wagon (estate to the Brits)

In most markets, the badging means this:

121 = single carburetor, basic package
122S = dual carburetors, sport package
123GT = rare special edition super sport package (model 130 only)

Volvo did not adopt the 142/4/5 type badging depending on body style until the 140 series.