Those were called the "Aqua-Lung Professional"
I only looked at a few catalogs. You can download many catalogs on line from VDH and take look at them. Many catalogs also had the prices.
1960 catalog page 15, available only in black. This seems to be the first year that they came out
1961 catalog page 15, available in black
1963 Catalog, Item numbers 6033, 6034, 6035, 6036 (four sizes) available in blue
1965 catalog, page 13, Item J, available only in blue
1968 catalog, page 6, Item B, available in both blue and black
1973 catalog, page 23, Item C, only available in black
1976 catalog, page 30/31, Item E, only in black
1980 catalog, page 35, only in black
So your blue ones were available for a few years, but the black ones were around a lot longer. Your blue ones seem to be from the mid 60's. I am sure the rubber is not going to be in great shape. Adding the color to the rubber normally decreased their longevity.
Yours are size Extra-Large, which makes them model number 6036, and in 1965 they were listed at $14.95. They were the most expensive fins in that year's catalog.
I only looked at a few catalogs. You can download many catalogs on line from VDH and take look at them. Many catalogs also had the prices.
1960 catalog page 15, available only in black. This seems to be the first year that they came out
1961 catalog page 15, available in black
1963 Catalog, Item numbers 6033, 6034, 6035, 6036 (four sizes) available in blue
1965 catalog, page 13, Item J, available only in blue
1968 catalog, page 6, Item B, available in both blue and black
1973 catalog, page 23, Item C, only available in black
1976 catalog, page 30/31, Item E, only in black
1980 catalog, page 35, only in black
So your blue ones were available for a few years, but the black ones were around a lot longer. Your blue ones seem to be from the mid 60's. I am sure the rubber is not going to be in great shape. Adding the color to the rubber normally decreased their longevity.
Yours are size Extra-Large, which makes them model number 6036, and in 1965 they were listed at $14.95. They were the most expensive fins in that year's catalog.