Mansell and Co, Vivian

London based printers and publishers, best known for their postcards and advertisements. The company's prints have frequently appeared on jigsaw puzzles associated with other companies, such as Victory and this Mandalay puzzle.
It does appear that they also marketed some puzzles under their own steam, such as the "Granny Knitting" puzzle displayed here. The company name on the box implies production prior to 1933, when they became a limited Company. Whether they actually cut their puzzles in house is unknown, but I suspect not.