Who does a backward K on Silver Jewellrey belong to please?

by Margaret
(United Kingdom)

I have acquired a couple of old Enamel brooches, which are marked 925 then what looks like a capital backward K immediately following the 925, 1 brooch is marked only 925 then a backward K. The other 925s then a backward K. I would be very grateful to know who the maker is if you have any idea. Many Thanks