Sounds like it is either the Comet Catcher if it has a glass window in the opening or a 4.5" (it will have a 6" tube if so) Newtonian scope if it doesn't have the window.
I suspect that it is a Comet Catcher due to the short tube length.
Any 1.25" eyepiece will work fine in the scope with the best focal lengths (the changing of which will change the magnification of the scope) with the larger numbers (up to 32mm) being of the lower magnification. Usable magnification will go up to about 250 power (go read the FAQ on Department store telescopes if this doesn't seem high to you) before things starting to get fuzzy.
If it is a Comet Catcher, the window is a special piece of glass called a Schmidt corrector plate and it will be very difficult to replace if you accidently break it!
In either case, the telescope you found was bought at a very nice price! Even the tripod will be worth more than that.