Bachmann 39-653ADC 39-653ADC BR Mk2F FO First Open BR InterCity (Swallow) No.3414 - DCC Fitted. Pristine BR InterCity Swallow livery. Running No. 3414. Bachmann Branchline OO Scale. The Mk2Fs were the final evolution of the Mk2 family, British Rail’s second generation of standard coach design, and these coaches featured full air conditioning, interior panelling made of plastic, a new style of seating and tinted windows.