Help identify master cylinder

likely late 80's to mid 90's dakota disc/drum piece. they and some of the FWD models had a wedge shaped reservoir.

but the bore says FMJR car line. and the reservoirs are interchangeable.

ETA: a disc/drum master *may* have a RPV in the body at the outlet, so you can check and see if it has one, however a lot of systems by that time had RPV valves elsewhere in the system, often times in the distribution block. one thing is certain, it is definitively not a drum/drum master.