MU CARS "54" Series

COACHES
MP54A/MP54Ac/MP54AT 1402-1420, 1452-1676
MP54A1c 1135-1179
MP54B/MP54Bc/MP54BT 1678-1777
MP54C/MP54Cc/MP54T 1784-1943
MP54D1c 1944-1983
MP54T 1001-1016, 1421-1450
(Of the above, 1678-1983 were arch roof, the rest were clerestory)

CLUB CAR
CT54Ac 1677

COMBINE CARS
MPB54c 1385-1399
MPB54T 1351, 1363, 1369-1381

BAGGAGE MAIL
MBM-62C 1209-1210

All club, combine, and baggage mail were clerestory roof.
MP - Motorized passenger
CT - Club Trailer (non motorized)
MPB - Motorized Passenger Baggage
MBM - Motorized Baggage Mail
54,62 - inside length of cars (the 62's didn't have vestibules)
A,B,C,D,D1 - various classes
T - Trailer (unmotorized)
c - ASC equipped (had cab controls, even in some unmotorized cars)

The date of the lists I've typed up are late 1957.

List of numbers used on LIRR P54s during the early 1950s:

COACHES
P-54 139-178
P54A,P54B 314-391
P54D 1-50,91-138,462-481
P54E 452-461

COMBINES
PB-54 622,624-627
PB-54C 628-631
PB-57 609-618

BAGGAGE
B-54 619-621,623

All were the arch-roof variety except the P54E, those were clerestory roof
Also B-54's were clerestory roofed.   

Contributed by Steve Hoskins