Hi Gary,
Well, the original brochure I have won’t help. It’s got a library stamp on it from 4 April 1961! The hand-written quote is:
“4-BERTH £1170-0-0
2-BERTH £1158-0-0″
No note as to whether that’s 6 or 4 cylinder. I assume that’s notation for “old money”, shillings and such. Maybe you can extrapolate the price for 1974 using these prices and the ones on TerriAnn’s site from 1969?
-Jeremy