Zag-Zaw line of puzzles was first produced in 1909, all incorporate figurals or whimsies, sold in red or orange boxes with labels on the side or bottom of the box, most without guide pictures. Initially cut non-interlocking but by 1930's became more so. Puzzles have a different cuts so that the same image will come in several versions which means that missing pieces can not be taken from other puzzles with the same image. See also Bob Armstrong's website on old jigsaw puzzles
OXFORD AND CAMBRIDGE BOAT RACE
750 pieces (see catalog entry), also comes as a 650 pieces zag-zaw (see catalog entry), and as a 590 piece zag-zaw(image and info courtesy of Bob Armstong's old jigsaw puzzle website),
