Looking in our repository of ads and brochures (see photo gallery):
This is a price list from 1971 - notice no 196 available (and we know this is from 1971 because it says so on it).
This price list was purchased as circa 1970 (I doubt it though - this one is probably later, like '72, or later, based on the pricing):
This price list was purchased as circa 1972 (but is probably '73 or later based on pricing):
