In the LHD models the pasenger also was the only one benfitting from the head rest. Alfa had different LHD and RHD seat arrangements so as Papajam said these seats are for LHD. IMHOIncidentally the same seats were in both the left and right hand drive 1750 Mk 1s. In the RHD cars the passenger gets the benefit of the headrest...
You can remove the seat backs and switch them. If you're often a sole occupant and the headrest is on the other side, you should switch them. Adjust the tilt mechanism until you can get an allen key into the screws.In the LHD models the pasenger also was the only one benfitting from the head rest. Alfa had different LHD and RHD seat arrangements so as Papajam said these seats are for LHD.