The consist for the new " Powhattan Arrow " included two 48-seat coaches with crew room ( P1 class, # 501 and # 502 ), two 66-seat divided coaches ( P2 class, # 511 and # 512 ), ten 56-seat coaches ( P3 class # 531 540 ), four 36-seat dining cars ( D1 class, # 491 494 ) and two lounge-tavern-observation cars ( P4 class, # 581 and # 582 ).