Burner is Stamped Sherwood to the adjuster knob with the Lynlight No 1 ceramic burner within the brass body stamped BR/WR as per the photos. the reservoir is good and solid with a bright reflector.
BRITISH RAILWAY SHERWOOD BRASS LAMP BURNER LARGE THREAD 35MM SHAFT & WICK
BRITISH RAILWAY SHERWOOD BRASS & CERAMIC BURNER STD FIT 40MM SHAFT & WICK
BRITISH RAILWAY RESERVOIR BURNER ASSY TAIL OR GUARDS PROTECTION LAMP C 1950