What's the difference between an Apollo 3 and an Apollo 3.5 circa 1983ish?

[thapablo]

Hi,

Can anyone help with some details about Apollo 3.5's from around 1983. I'm trying to find one (had one as a kid, bought from Gray's Cycles, Box Hill, Victoria) - only seen some 3's on Ebay etc.

If the difference was minimal I'll pick up a 3 - so what was the difference between the two?

Also, anybody know who the owner of the above store in Box Hill was?

Thanks very much for the help.

Paul