Hi Enrique:

Yes, the Series I, Series II and very early Series III cars had the rubberized fabric bands for support of the thick foam rubber seat cushion...Sometime in Jan. of 72 the cars started coming with the spring supports in the seat bottoms. That was necessary, so that the deflection of the seat bottom could be sensed - for the Seat Belt warning system to work. You can tell the early Series III cars from the later one's simply by looking at the center console (if it's original)... the early cars didn't have Red Seat Belt Warning Lights on the cover over the fuse box.

"71" - - "72"? I thought we were talking about Series I and II differences...

Series I 10/69 into 01/71

Series II 01/71 into 09/71

Series III 09/71 into 08/72

Series IV 08/72 into 08/73

Other than the seats... if you really did mean Series I - with the round seat angle adjusting knob..It sounds like #43274 had the items that a Series II car should have. The Series I and II dash and center console were the same. The indent for the hazard switch label started with the Series III cars..and the center console was redesigned at that point partly because of the new Type "B" transmission.

Carl B.

Also noticed the gas cap door has a lock. That wasn't carried over from '71 to '72, was it?