. The wheel is most definitely a Maico narrow frame, square barrel model, full width front wheel with Akront yellow sticker rim. I have the two original front wheels from my Maicos and they're identical.
I recently supplied an identical wheel to Denis ? (can't recall his name right now) in Victoria and it was identical to what he wanted. The hubs you are describing with the Maico emblem stamping didn't come to Australia in any of the Blair Harley imports from late '69 - 71 to my or Per Klitlands knowledge. They appear to be from the wide frame, up pipe, oval barrel models from '66 thru early 1969 when they went to the narrow frame squaries.
Nothing in Maicoland is written in stone as you know. Being a small factory they chopped and changed willy nilly, using up parts from the shelves until they were gone. That's why you'll get 2 '69 models, one with a wide frame, polished outer cases and embossed hub and the other with the narrow frame, slotted small full width hub and sand cast outer cases. A good example is to compare Mick Hockleys square barrel 350 and mine. Micks is a '71 model, mine a '70 only 10 or so numbers apart yet his came with wide frame alloy fenders, narrow fibreglass tank, riveted seat and polished die cast outer cases, mine came with narrow frame, sand cast outer cases, wide fibreglass tank and fibreglass fenders. Both bikes had the same front hub. Engine wise, outer cases aside, they are identical. I've modified mine over the years but still have all of the original parts to refit it I want. I have an AW250 front wheel fitted but like I said, still have the original. Mick however, has kept his pretty original and as you can see rom the photo, features the front wheel in question.
I hope this explains it all. ...............................Firko