What do you want to do with it? It's a mono system with one speaker, so it's doing what it is designed to do.
As long as you match the dimensions and impedance (4/6/8 ohm) and the depth of the speaker (distance from front of frame to back of magnet), any replacement will fit and work. It's possible Crutchfield has the original dimensions on file. I suspect they deal mainly in stereo, but they might have the original mono system info too.The speaker cone is ripped and nearly dust so I am looking for a replacement or rebuild. Six different sources don't show a solution.
If that speaker can handle 250W, then I hope it's sensitive enough for the radio to move it. If you have the stock factory radio it's only capable of a fraction of that power.Thanks for the ideas. I wound up with ordering
Pioneer TS-G1320S 5-1/4" 2-Way Coaxial Speaker 250W Max
This rings a very faint bell with me. (It has been 39 years since I sold my 1970 240Z.) Good thing to check, because impedance is a definite issue.kschuette2 you might want to be careful on if the speaker and radio are compatible. I'm restoring a 1979 Camaro and staying very original. When it came time for the radio and speakers I learned that I had to get 10 ohm speakers. Rather difficult to find. My research showed this was typical for this era. Apparently, this is what a 1979 factory stereo required and if you us modern speakers, that are rated at higher ohms, you will cook the stereo. I haven't started on my 280z restoration so I have not looked into the speaker-stereo requirements for these model cars. If your stereo is original you may want to do some more research. Food for thought.