Right Gertjan!
The USCG used the SEA GUARD the first amphipious helicopter. One engine. The navy wanted two engines so Sikorsky made the bigger version ( two engines but still one gearbox!)
Ringo Toys ( a division of Ideal )made a 1/48 scale kit of the Sea Guard amny years ago. The rivet detail is over done and the decals fit into heavy molded in guides ala Aurora, and the landing gear is for the civilian version but it is do-able.
Both the Revell kit and Trumpeter kits are CG decaled versions of the SA365N, the CG version is the SA366G.
Testor's makes a metal kit of the MH68, prepainted and a bear to put together.
The Jayhawk has to be built as described in FSM.
(Also, the HH52A has been retired from the USCG for quite some time now, the HH65A was the replacement.)
Don
I know it's only rock and roll, but I like it.