What is my tonearm??

I have one also. Basis used to (maybe they still do) sell these with the 2000 and 2001 turntables as an entry level arm. They have a smooth sleeve instead of threads on the outside.

If you want a big upgrade in your sound replace this with a Basis Vector tonearm. It is a drop in replacement. They come up for sale occasionally. I replaced mine with a Basis Vector 3 and the improvement was amazing.

Do not buy a Basis Vector tonearm for the 2200 - 2800 models. You need the low cup model for a 2000 or 2001.

You should check with Basis to see if the Vector arm is a good match with you Lyra cartridge. Just send an e-mail with the Lyra specs. I think it should be fine because the weight and compliance of the Lyra is similar to my Shelter 901.

Aren't the rega 250 & 300 typically black? Seems like it looks like a 600??

It looks like the Rega 600 that was on my Rega P-25. You could call or e-mail Basis and ask them. They may need the serial number on your turntable for reference.

A Vector tonearm would be a significant upgrade to the sound of your system and a drop in replacement.

Jperry,
I mounted a Vector 4 with calibrator on my 2001 without problem, although I had to turn the tonearm mount board to get the correct length and contact for the calibrator knob. Is there a different base that I should be using?