It's impossible to say, as what appear to be / are accepted as fishing reels have been found depicted on ancient Chinese artwork!
Reel Fishing III happened in 2003.
Reel Fishing Challenge happened in 2009.
Reel Fishing II happened in 2000.
Sportfisher reels have been available for many years (at least 20 years ago, they were offering baitcaster / multiplier-type reels). Like many / most current reels, they are mass manufactured in the Far East, in the case of Sportfisher, this was most likely Japan, though the actual manufacturer might even vary from year to year! The Sportfisher range of reels was typically perceived as a 'budget' range, and was often offered in combination with a rod by a 'name' manufacturer, so typically you may see an advert for an'Abu / Shakespeare / Diawa rod with Sportfisher 450ZR reel' etc. This sort of implies that the reel may also be of Abu / Shakespeare / Diawa etc manufacture (which may help sell the rod and reel as a combo), but the fact remains that the reels themselves were a Japanese manufactured, budget reel for the mass-market.
The Zebco 600 was manufactured from 1970 up until 1984, when it was replaced by the 606.
It's possible but the reel and rod are not made to handle the stresses that monofilament fishing line will put on the gear. The drags on a fly fishing reel are not as robust as a conventional reel.
Reel Fishing III was created on 2003-06-26.
Reel Fishing Challenge was created on 2009-06-29.
Reel Fishing II was created on 2000-01-27.
George Snyder was the person who mad ethe fishing reel.
The most conventional fishing reel is the spinning reel. Easy learn and easy to use for most general applications.