London

350+ piece interlocking cardboard jigsaw puzzle featuring an unsigned artistic panorama of London and some of its key landmarks.
A useful reference on the box to Circular puzzles number 527 and 528, known to have been issued around 1957, helps to date this puzzle to that era also.
Many thanks to David Crocker for the supplied details and images.

Artist: Unsigned
Date: c1957
Brand: Waddington's
Material: Cardboard
Nationality: British-England
Number: 851
Pieces: 350+
Range: Cinemascope
Size: 29" x 9 1/2"
Theme: Cities
Title: Cinemascope-London