Electronic Control Unit (Forward/Backward - Stop)

Notable parts

• 4 parts appear in only a few other sets: Electric Connector, 2 Way Male Rounded Narrow Type 2 with Hollow Pins (Red) ×2 — also in 138 Electronic Train (all Train); Control Unit, Train 4.5V Whistle Brick 4 x 8 x 2 with Forward/Stop/Reverse… (Trans-Clear) — also in 138 Electronic Train (all Train); Whistle, Train 4.5V, Adjustable with Yellow Base (Black) — also in 138 Electronic Train (all Train); Microphone, Train 4.5V 4 x 4 x 2 with Vertical Plug Sockets (White) — also in 138 Electronic Train, 139A Electronic Control Unit (Forward - Stop), 118 Motorized Freight or Passenger Train (Sears Exclusive) (all Train).

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.