Savoia, To my knowledge, the S61 was the first Airline Transport helo, and had the first Cat A procedural approval, in either 1961 or 62. It was quickly (within a few months!) followed by a vertol machine, I believe the civil Vertol 107.
Here is a link to the historic archived TCDS, dated 11/1/1961, and including Cat A procedures:
Type Certificate Data Sheet 1H15
The Bell 212 Cat A was dated 6/30/1971:
Type Certificate Data Sheet H4SW
The V-107 1/26/1962:
Type Certificate Data Sheet 1H16