Sikorsky S-61A , export version for the Royal Danish Air Force. Wider pontoons, a 530 liter centre tank instead of a dipping sonar and no automatic powered folding system. In June 2010 the Sikorsky S-61 SAR helicopter was withdrawn from the RDAF replacing it is the AugustaWestland EH101 Merlin
This photo is for my friend Victor.
The Sikorsky SH-3 Sea King (company designation S-61) is a twin-engined anti-submarine warfare (ASW) and SAR helicopter. It served with the United States Navy and other forces, and continues to serve in many countries around the world. The Sea King has been built under license in Italy and Japan, and in the United Kingdom as the Westland Sea King.
Old slide scan ca. 1964/65/66
Canadian Airline Blog