St. John's Bridge, Cambridge

Well cut semi-interlocking plywood jigsaw puzzle, part of the stock of the Neville Puzzle Club, numbered on the reverse of each piece as puzzle number 461.
The box title is St. John's Bridge, Cambridge, although it is more popularly referred to as the Bridge of Sighs, crossing the River Cam at St. John's College.
The painting is by the British artist Dennis Flanders (1915-1994)
I have no date information to go on, but would estimate it to be of c1950's origin.

Artist: Flanders, Dennis
Date: c1950's
Brand: Library Puzzles
Material: Plywood
Number: 461
Pieces: 319
Size: 14 1/2" x 11 3/4"
Theme: Bridges
Title: St. John's Bridge, Cambridge