March 7

I have some questions again regarding today's deck. It was published as an advertising deck for Pompes Guinard, a French company that produces all kinds of water pumps since the 1920's. The courts have simplified modern designs in 4 colours. The deck has 52 cards, 2 jokers and 2 blank cards. The name MMG appears on the AC and on the jokers. Those are probably the initials of the manufacturer. There's no reference to a date and I my guess, not even an educated one, is that it dates from the 1950's. So if there's anyone who could tell me what MMG stands for and would have a date for this deck, I would be grateful. Pascal? Yves?