I have some old school 12A parts. Does any know which car would have had the 12A housings that had "12A toyo kogyo" in the casting not Mazda like the newer ones? The front middle and rear housings have the old M symbol.

 

welcome to the board.

my guess would be probably 1970-74. however, don't hold me to that. i'm not sure how often any of the really well-versed "old school" guys like Jeff20B, Siraniko or J9fd3s cruise this section, but any of them should be able to help you nail it down.

also, posting a photo would help your cause.

 

Pics