This demonstration showing that "K" Suede Shoes were waterproof, took place in one of Patterson's shoe shops in April 1970.
You should be able to see the tray of water they're stomping about in!
The twa lassies are Barbara Lindlay and Mary Elliot.
Not sure which of the Patterson's shops it was as they had branches in Kirk Style, Lochee High Street, Brook Street in the Ferry, 2 in Albert Street and a wholesale place in Bank Street.
Take your pick!