'Unusual', not usually or commonly seen, in this case, this particular combination in a 69 Bee.
Okay, gotcha.
FWIW, I don't think "unusual" or "odd" characterize this combo. To me those words imply something that doesn't match or, at the very least, aren't a factory recommended combination.
;-) Excuse my confusing wording as English is not my native language - "not commonly seen" on a 69 Bee is exactly what I meant...
