McCulloch One Name Study

Here's another "accidental" eBay purchase to share with you. Originally I assumed it was the same firm but now I'm not so sure. This William McCulloch having his firm in Maybole, South Ayrshire, Scotland. I do love it and wonder if there can be many others like it given it was probably used like a business card or advertising flyer. Any information greatly received especially if this is the same McCulloch from "Wales & McCulloch" in London.

I came across this clock key for sale on eBay apparently for a clock manufactured by "Wales & McCulloch". They seemed to be a London-based firm with a shop at 20 Ludgate Hill. I haven't yet managed to track down who this McCulloch was or where he came from so it's still an unsolved mystery! Any further information about Wales & McCulloch would be gratefully received. And yes.. I did buy the key :) EDIT: Added a few other beautiful items made by W & M also below. Pair of antique silver caviar trays in original box by Wales & Mcculloch A yellow metal Egyptian style brooch,  with scarab beetle type insert in fitted case for Wales and McCulloch