According to Chris Brookers reference books it is likely that the brass one maker marked W. Scully Ltd was issued post 1953 (Vol 3, Page 148). It is likely that the one in white metal was issued post 1953 as well as the boar's snout on these later pattern collars are fatter then their earlier versions. He does not indicate any collar patterns pre 1953 as being maker marked. That said his books are although an excellent reference, sometimes less than accurate. He indicates the brass pattern as OR's.
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