HO F3A / F3B Locomotive Set Freight FEC #503 and #552 (ATHG-1703)

HO F3A / F3B Locomotive Set in Florida East Coast freight livery (numbers 503 and 552) brings two classic EMD F-unit diesels to HO-scale layouts. This two-unit diesel-electric pairing is designed to power realistic mainline freight on HO layouts, offering authentic styling and the bulldog-nose silhouette that fans associate with prototype service.

Designed for modern HO layouts, these locomotives feature directional LED lighting, see-through cab windows with full interior, and a host of prototype-inspired details such as grab irons and etched metal parts. The heavy die-cast frame, RP25 wheel contours, and all-wheel electrical pickup deliver solid traction and smooth operation, while a Quick Plug 21-pin NEM interface enables straightforward DCC upgrades. Sound-equipped variants add onboard DCC decoders with Tsunami2 sound and dual speakers for enhanced realism, with MU capability for coordinated lashups and full support for both DC and DCC operation.