Kay

Thought to be of c1920's-early 1930's origins, my first example from this brand, that of Loves Old Sweet Dream, carries the type of graphics normally seen in puzzles of that era. It quotes on the label that it is number 4 and the label also carries an identity number of 1087, which probably denotes the label's identity rather than having any relevance to the individual puzzle.
I am aware of the Kay branding in products other than jigsaw puzzles, most specifically that of The Electric Wizard. See image in the Loves Old Sweet Dream entry.
Please make contact if you are aware of any other products, or further examples of their puzzle production. Thank you.