It it is from an Adlake signal lamp but would suit others with the screw in fitting to your lamp. Very difficult to find.
BRITISH RAILWAY ADLAKE 55 OR SIML RARE FRAGILE GLASS BURNER FUNNEL 33mm dia 1950
ADLAKE 55/4 BRITISH RAILWAY SQUARE SIGNAL LAMP EX BR TRACKSIDE TO RESTORE
ADLAKE 55/4 BRITISH RAILWAY SQUARE SIGNAL LAMP ETCHED GLASS 81 X 81 mm 4 AVAIL
British Railway BR Adlake Non Sweating Railway lamp Complete Railwayana
BRITISH RAILWAY PLANLITE SIGNAL LAMP STEEL BURNER &GOOD WICK SUIT ADLAKE or oth
British Railway Vintage Lantern Adlake Non-Sweating Lamp Top
