Raco-Intalok-Zig-Zag Puzzle.

The RACO, or Richards Art Co., branded Intalok Zig-Zag puzzles follow on from the later era of the Zig-Zag Puzzle Company, which started producing top-class wooden jigsaw puzzles from the early 1900's. During these later years they produced a catalogue under the name of Grant Richards Limited. It is now known that Grant Richards was the connection between these RACO branded examples and those earlier Zig-Zag puzzles.