Very cool find - I remember the gliders when they were new (spent a lot of my youth reading catalogs!)....but I don't recall a glider like that with derailleur gearing. I suspect a PO has made it into a 10-speed - it is more likely it was originally a 3-speed SA hub'd bike with 26x1 1/8 tires, chrome rims, steel fenders that matched the frame colour, etc....

Have fun - my mother had a white ladies version and it was great to ride.

Mark