| C/N | Version | Built | History |
| 61-001 | | 1959 |  147137 : Sikorsky S-61A c/n 61-001 ff 1959; del USN as XHSS-2 147137 unk; S-61 prototype; used by Sikorsky for test, certification and demonstration flights to US military and civil operators; redesig YHSS-2 unk; redesig SH-3A Oct 62; reported w/o unk date & location. 
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| 61-002 | | 1959 | 147138 : Sikorsky S-61A c/n 61-002 ff 1959; del USN as XHSS-2 147138 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-003 | | 1959 | 147139 : Sikorsky S-61A c/n 61-003 ff 1959; del USN as XHSS-2 147139 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-004 | | 1959 | 147140 : Sikorsky S-61A c/n 61-004 ff 1959; del USN as XHSS-2 147140 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; conv RH-3a unk; xfer HC-7 unk; status unk.
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| 61-005 | | 1959 | 147141 : Sikorsky S-61A c/n 61-005 ff 1959; del USN as XHSS-2 147141 unk; redesig YHSS-2 unk; conv VH-3A unk; xfer HMX-1 unk; status unk.
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| 61-006 | | 1959 | 147142 : Sikorsky S-61A c/n 61-006 ff 1959; del USN as XHSS-2 147142 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-007 | | 1959 | 147143 : Sikorsky S-61A c/n 61-007 ff 1959; del USN as XHSS-2 147143 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-008 | | 1959 | 147144 : Sikorsky S-61A c/n 61-008 ff 1959; del USN as XHSS-2 147144 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-009 | | 1959 | 147145 : Sikorsky S-61A c/n 61-009 ff 1959; del USN as XHSS-2 147145 unk; redesig YHSS-2Z unk; conv VH-3A Oct62; status unk.
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| 61-010 | | 1959 | 147146 : Sikorsky S-61A c/n 61-010 ff 1959; del USN as XHSS-2 147146 unk; redesig YHSS-2 unk; redesig SH-3A Oct62; status unk.
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| 61-011 | | 1959 | 148033 : Sikorsky S-61A c/n 61-011 ff 1959; del USN as YHSS-2 148033 unk; returned to SIkorsky for conv to S-61F high-speed research aircraft for NASA; redesig NH-3A Oct62; ff as NH-3A 21May65; achieved top speed of 242 mph (390 kmh); status unk.
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| 61-012 | | | 148034 : Sikorsky S-61A c/n 61-012 ff?; del USN as HSS-2 148034 unk; redesig SH-3A Oct62; status unk.
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| 61-013 | | | 148035 : Sikorsky S-61A c/n 61-013 ff?; del USN as HSS-2 148035 unk; redesig SH-3A Oct62; conv UH-3A unk; status unk.
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| 61-014 | | | 148036 : Sikorsky S-61A c/n 61-014 ff?; del USN as HSS-2 148036 unk; redesig SH-3A Oct62; conv HH-3A unk; xfer HC-7 unk; status unk.
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| 61-015 | | | 148037 : Sikorsky S-61A c/n 61-015 ff?; del USN as HSS-2 148037 unk; redesig SH-3A Oct62; status unk.
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| 61-016 | | | 148038 : Sikorsky S-61A c/n 61-016 ff?; del USN as HSS-2 148038 unk; redesig SH-3A Oct62; conv RH-3A unk; status unk.
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| 61-135 | | | 149718 : HSS-2 Sea King. SH-3A 1962. convert UH-3H unk. refurbished and sold Argentine Navy 2007
 0882 : Accepted ARA jul08 as 2-H-241. UH-3H refurbished by Clayton internacional in USA 2007
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