The original 1000 wheel cylinders were provided to Nissan by both Nabco & Tokico, so either of these may be found on an original car. They are interchangeable as an assembly, but none of the parts are.

Only one of these manufacturers provided the cylinders for the 1200 [but I forget which] & they are simply the 1000 part carried over, as the drum brakes on a 1200 are actually Datsun 1000 items anyway.

Go with D/man_1000's recomendations & you won't go wrong.