ok, time to consult my spec sheets:
R1-R9 (BMT/IND): Wabco H2A
R10-R22 (IRT/BMT/IND): H2C
R26-R28, R30-R30A (IRT/BMT/IND): H2C on # 1 end, H2CAR (semi-permanent for married pair operation) on # 2 end
R26 GOH and R28 GOH (IRT): H2C on #1 end, H2CAR replaced by linkbar
R29 and R29 GOH(IRT): H2C on #1 end, Waugh linkbar model # 4F7579
R32, R38, R40S, R40M, R42, and all GOH versions (BMT/IND): H2C and linkbar
R33, R36 (all versions, IRT): H2C, Waugh linkbar # 2F7631 or WABCO linkbar # 565150
R44 pre-GOH (IND): Ohio Brass form 70, no specific info on GOH couplers other than addition of linkbars
R46 pre-GOH (IND): no specific information
R46 GOH (IND): Hadady coupler, # RTD107, Morrison Knudson linkbar
R62-R68A (IRT/BMT/IND): H2C and linkbars
R110A (IRT): WABCO N2C and linkbar
R110B (IND): New York Air Brake Company # RTC-201P and linkbars
R142, R142A (IRT): both same model from WABCO, model # not listed, linkbars
R143, R160 (BMT/IND): same as R142, R142A
hope this helps.
NOTE: just because certain cars have the same coupler, DOES NOT mean that they are compatible. Compatibility is also based upon brake equipment (primarily), and some other minor systems that i am not aware about.