This led to the creation of British Railways. The letters SR indicate it is a Southern Railway spanner. This would also indicate it was manufactured before 1947. 5/16 W, 3/8 BS x 1/4 W, 5/16 BS.
Scarce Vintage Southern Railway Snail Brand Spanner 11/16 & 3/4 AF 0.69” & 0.75"
Snail Brand 1/4W & 5/16W Spanner BR/W
Vintage Railway Spanner BR/M . Snail Brand
Dapol NB016 Southern Railways S2279S N Gauge Brand New In Box
KANSAS CITY SOUTHERN - Midwest Division - (BRAND NEW BOOK)
Bachmann 32-395 Class 37/5. '37669' West Coast Railways Livery. Brand New.