Vintage Milton Bradley Coventry Jig Saw Puzzle. Mt. Vernon. Five hundred interlocking pieces of extra heavy board. 14 1/2" X 20". No. 4906. Twenty-four subjects in this series of puzzles. Circa between the 1930s and early 1940s. There is one piece missing, and there is one piece broken. These older puzzles are challenging to put together. Although the cover says interlocking, all the pieces have at least one flat edge and one interlocking side. There is some wear to this puzzle, but it still has a great historical picture. This puzzle has some wear Great heavy pieces for other crafts. The original box shows some wear, mainly around the edges.