This is an SL-1025 that came in for repair. The SP-25 drive unit had a dead power supply, and I happened to already have a working SP-15 that would drop right in, so I bought the plinth (Technics SH-15B2) tonearm base (EPA-B500) and swappable tonearm tube (EPA-A250) from the owner and dropped my SP-15 in it. Heaven!
The A250 is a medium mass curved arm with a removable headshell. So of course when an EPA-A501H (low mass straight tube) showed up on eBay, I had to buy it.
It sounds better than it looks, if you can believe that.