Souvenir of their Majesties Silver Jubilee 1910-1935

This plywood, interlocking puzzle is relatively common in the normal book style box, but this version is very scarce, coming in a silver foil covered box, with the pieces retained by an egg shaped sliding card door.
The box front features space for address and postage stamps, so was presumably available to order as a gift to commemorate the occasion.

Artist: Photographic
Date: 1935
Brand: Chad Valley
Material: Plywood
Nationality: British-England
Pieces: 250
Size: 14 1/4" x 10"
Theme: Royalty,
Title: Souvenir of their Majesties Silver Jubilee 1910-1935