Large Flat Box Series

A group of 500-piece circulars made in the late 1960's to early 1970's with unrelated subjects but all housed in large shallow boxes 13" square x 1¼" deep. These were lightly constructed but clever design made them reasonably robust.

Minimal information appeared on these boxes, just title, number and 'Vari-piece puzzle on Qualitex Board'.

Reference numbers are confusing, some are used more than once and others appear on different puzzles in other series.

Some puzzles, for instance 533. Wildfowl were sold in other series and are illustrated there.