Hi All I recently purchased a W.U. CD 125 and after receiving it and on closer examination I noticed it says PATENT/PATENT/DEC 19 1871(Rear skirt) Does anyone know how Common or uncommon the first PATENT embossing is, it seems to also be a different engraving style almost a script lettering tilting to the right. Thanks for any help. Picture is not clear hard to get a clear shot but embossing is raised and you can feel it if you run your finger over it.