NOTE: Sid Lethbridge 2020: This post provides a summary of the two patents issued the same day - October 16, 1886 - and assigned to[Bryce Brothers and George Duncan & Sons]...and how to differentiate between the product of each factory made using these patents. Parts 2 and 3 will present a summary sheet for each company's line up of glass foot ware novelties. See: BRYCE BROTHERS DAISY & BUTTON SHOES, SLIPPERS, BOOTIES, BOOTS and DUNCAN, GEORGE & SONS SHOES, SLIPPERS, BOOTIES, BOOTS.
Please keep in mind that there are many, many reproductions of these shoes and they are not discussed here.