Although the Delaware & Hudson K-62 class featured the recessed headlight and clean lines of D&H steam power, in their internal dimensions they closely resembled other 4-8-4s built by Alco during World War II including the Rock Island's R-67 class and the Milwaukee Road's S-3 class. For their specifications consult the commentary for No. 308. This photo of No. 309 is unattributed and its location and date are unknown; no locomotives in this group survive.