Number Order Type TOPS Weight Seats Lot No. Diagram Formation Year
M50134 - 50137 2d DMBS 111/2 33t 52 2nd 30248 BR 520 P/Trailer 1957
E50270 - 50279 2xb DMC(L) 111/1 33t 12 1st 53 2nd 30268 BR 616 3-car 1957
E50280 - 50289 2xb DMBS 111/2 33t 52 2nd 30338 BR 524 3-car 1957
E51541 - 51550 4c DMBS 111/2 33t 52 2nd 30508 BR 615 2/3-car 1959/60
E51551 - 51560 4c DMC 111/1 33t 12 1st 53 2nd 30509 BR 617 2/3-car 1959/60
M56090 - 56093 2d DTC(L) 147 25t 12 1st 53 2nd 30337 BR 628 P/Trailer 1957
E59100 - 59109 2xb TS(L) 164 25t 71 2nd 30269 BR 623 3-car 1957
E59569 - 59572 4c TS(L) 164 25t 71 2nd 30510 BR 623 3-car 1959/60
E59573 - 59578 4c TSBL 165 25t 53 2nd 30615 BR 625 3-car 1960

The 1957 ER 3-car sets were unusual in that the DMCs were numbered lower than the DMBSs.