More help to decode vin on 39 special

[raceric]

I was hoping to get more info on my recent purchase of 39 buick special (says speacial on the hood molding) i was told it is an opera coupe because it has fold down side facing jump seats in the rear and slidind rear side windows?? The tag oh firewall 1939-4427 any help would be great thanks rich ih n.j

[thepartsman]

1939 - 4427 = Model 46S Special Sport Coupe ( Opera Seats ) 4 passenger.