G&S, Kilmarnock Seal (Glasgow and South Western Railway?)

G&S, Kilmarnock Seal, Image & Found by Pat Quinn.
Found in Renfrewshire, Scotland, 15mm.

G & S / W.Ry // KILMARNOCK around

From Philippe Lanez, "I would suggest this seal reads G & S W Ry. as a short form for Glasgow and South Wester Railway, operating between 1850 and 1923."