Cavalcade (Mack, W.E.)

Producing interlocking plywood jigsaw puzzles branded as Cavalcade, W.E. Mack, London, N.W.3., marketed their puzzles either as:
Cut by ex-Servicemen, or cut by The Lord Roberts Memorial Workshops.
Cutting style varies considerably between examples.
The use of the term Cavalcade also appears as one of the series titles of the British brand of Philmar jigsaw puzzles.