"Carnival" in Venice

120-piece, fully interlocking plywood jigsaw puzzle, estimated to be of c1930s manufacture and featuring a romantic artistic study. The artist name appears to be Stanislaus Pinx, but I have not been able to corroborate this through any other artwork research. See lower left frame corner detail and lower right corner signature.

Artist: Pinx, Stanislaus?
Date: c1930's
Brand: Valentine and Son's Ltd.
Material: Plywood
Nationality: British-Scotland
Number: 120
Pieces: 300
Size: 10 1/2" x 15 1/2"
Theme: Portrait, Glamour,
Title: Carnival in Venice