I do think it's a 1950 model like the sticker says — though I would agree that was put on later. I would guess, like was said, that it's a Model 21 Sports Tourist with an optional fork lock and dynohub. The Royal Carmine Red, the thin fluted crank arms, and the fork lock all point to that. What a cool bike!

I wonder what date is stamped on the front and rear rear hubs.