Not a Wally World bike at all. It is an "Olympic", their entry level bike. I would guess somewhere between '72 and about '75. These were sold in bike shops, not discount stores. Price new in '73 would have been about $120.00. Model above that one was the "International", which came with aluminum rims, cotterless crank, center pull brakes and a CroMo frame. I used to have one of those back in the day.

Nice find!