The S-55 served with the United States Coast Guard this version of the HO4S-3G was redesignated HH-19G in 1962. This model based in Miami, Coconut Grove Coast Guard Station flew in the early to late 1960's. 30 were built. Enjoy!
Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.