Engine serial number - Do you H or do you not H?

["Rex R. Townsend" <rrt@connectexpress.com>]

Hi All,
    Got a question for all you Triumph historians.  My 1969 US spec TR6 has
a "H" in the engine serial number, although my TRF big book says that means
"high compression" and was used on the English or European spec cars.  My
engine number is CC26719HE, which indicates that it is a carbureted engine -
but what does the "H" mean?  What about you other owners of early "CC"
cars - Do you have an "H" in your engine serial number?

Rex Townsend
1969 TR6 comm. #CC26713L
Bainbridge Island, WA