Bingo! Ask and ye shall receive!
I went to the linked site and confirmed what Have Quick provided.
That database shows that A Model being "sold" to the RAF....no other information listed there as to date or anything.
I shall continue following up at some other locations.
Thank You for the nearly instant reply!
For all US Military Tail Numbers....this site is pretty good.
USASC-USAAS-USAAC-USAAF-USAF Military Aircraft Serial Numbers--1908 to Present
Dave,
Memory tells me the B Model was an Interim Model built while the C Model was being finalized and the cancellation was due to the purchase of C Production models Airframes.
The B Model had the basic C Model airframe (square tail) and up-graded T-55 L-7C Engines. The A Models were also provided the up graded engines and made it a much stronger aircraft in Hot and High situations.
A bit more info....
61-02414, Boeing build number B-018, was a HC-1B helicopter. The U.S. Army acceptance date was 25 April 1963. 61-02414 accumulated 3,010 aircraft hours.
In July 1962, the Department of Defense redesignated all U.S. military aircraft to a new system. All HC-1B helicopters became CH-47A.
61-02414 was sold to the United Kingdom under Foreign Military Sales (FMS) Case UK-B-VNG on 8 January 1982.
As of 8 January 1982, the last known location of 61-02414 is unknown.
A B Model tail number 66-19103 was sold to the RAF in 1984-85 time frame.