What car would these wheels come on?

Kind of curious to what year/models of cars these wheel would have come on. M 9 30 rim code by valve stem. Barrel code in pics.

what's the number under the M5 on the barrel?

Looks to be a 9.

14 x 6 were on 70 b and e Looks to be root beer colored like several 70 model cars I have.

From the pics I thought they looked like Burnt Orange, which would mean a 1970 car.

I think it’s burnt orange. The barrel looks root beer. Not sure if these were repainted or original paint.

Are the backside painted , or black ?

wheels were repainted, so it's probably hard to tell.

Well that answers the original paint question .