BSG.BS.00478
BSG.BS.00478 — U.S.A., Railway, Baltimore and Ohio Railroad Seal
U.S.A., Railway, Baltimore and Ohio Railroad Seal, Image & Found by edgarscoolingandheating.
Found in Charles town on the famous Samuel Street, ?mm.
B&O // (?0)00(?!)
The Baltimore and Ohio Railroad, 1828–1987, had a reporting mark of B&O and BO.
For more information see Baltimore and Ohio Railroad, Wikipedia.