The Kasner Bros. were contractors in NYC. They installed restaurant and bar interiors.
They published real photo postcards to advertise the quality of their work.
This card has a view of a linch counter Soup was 10 cents, Swiss Cheese & Tomato sandwich 15 cents, a hot dog 25 cents.
The card back was used from 1929-1949. My guess on date is late 40s-early 50s.
Some very slight corner wear, a card in excellent collectible condition