German? KGH Seal

KGH Seal, Image by StuE, Found by Irish Mikek.
Found in Memmingen Bavaria South Germany 20mm, 10.7g.

Plain seal with K.G.H followed by half size W with two dashes beneath it (the K is very faint). On the other side P.G.(U.?) followed by half size W.

No products, manufacturers or location of production have been linked with this seal so far.