It doesn't say what speed it runs at, all it has is a selector that goes from slow to fast. It was set to slow when I got it. That's not very helpful I guess 
That means it might play anything from a 45 rpm to a 78 rpm record.
TMM, you might be able to find a crank that will work just by asking antique/collectibles dealers iffen they have one laying around somewhere or you could probably make yourself one.
But before you go looking for one you need to
measure the diameter of that hole in the side and also
find out what "thread" size the crank is. The end of the crank (that goes thru that hole in the case) will have a hole
in the end of it that is "threaded". Inside the record player in line with the hole in the case is a "threaded" stud that when turned, winds up the spring that powers the turntable.
Thus, when you insert the crank, turn it until it tightens up on the threaded stud and then more turns will "wind up" the spring.
So, ya need to take the mechanism out of the case, which is probably held in by 4 small bolts, ...... and find
a nut that will fit those threads on that stud. And what I suggest the next thing that you do after finding a nut that will fit the threaded stud is: twist it on, then get a wrench and see if you can "wind up" the spring.
Iffen you can't wind it up so that the turntable will turn round n' round, then forget it, ...... either the spring is broke or it is wound too tight and the mechanism is dirty, jammed or broken.
If the mechnism is working ..... then you can take that nut and go looking for a crank ....... with a diameter small enough to go thru that hole in the case ..... and threads that the nut will twist onto.
Or you can, or have someone, "drill n' tap" a steel rod with the thread size of that nut and then bend it in the shape of a crank, making sure you don't "bend it" too short cause it won't engage the threads iffen you do.
