Gilt, 17mm across.
GREAT NORTH EASTERN RAILWAY ( GNER ) obsolete railway uniform button 22mm
Vintage 25mm Firmin LMS LONDON MIDLAND & SCOTTISH RAILWAY Uniform Button #pP121
Manchester Ship Canal Railway Uniform Button - 17mm - Merchant Navy
Vintage ~25mm Firmin Black B.R BR BRITISH RAIL Railway Uniform Button #pP139
small size North London Railway uniform button NLR - pre 1923 - 16mm diameter
VERY OLD GWR GREAT WESTERN RAILWAY UNIFORM BUTTON - SEE PICTURES