Possibly late 1930s pat number is 3796-36 which is on the box and instructions. The box is tired, worn and grubby due to age. (Ripped in 1 corner). Full sets of cards.
Vintage Monopoly Board Game Waddingtons Complete With Instructions
Vintage Parker Spiele Monopoly Board Game German Language Game Board Edition
Monopoly Junior Game, Monopoly Board Game for Kids, Family Game for 2-4 Players, Multicolor
Monopoly Board Game 1961 Vintage, John Waddington Edition
Thunderbirds Monopoly Board Game - Parker - Vintage 2004 - Complete
Vintage 1984 Waddingtons Monopoly Board Game 100% Complete Pewter Pieces