A33. 16x1 female side mount
Links to photos of examples:
The A33 upper valve is an original Paoli 16×1 side mount valve, made in Italy. All their polyurethane inner seal disks have decomposed, even on the last few new valves.
The A32 lower valve is a modern OMG substitute, made in Italy. It is valve A32, a 16×1 vertical mount spigot back, mounted sideways. The cover panel must be removed, or a large hole cut, to allow access to the substitute valve. There is no reserve capacity on the substitute, since the reserve tube is horizontal.