Grace tonearm identification

[Auditt4mark]

Hi all, I'm trying to identify this Grace tonearm. And, is the identifying info anywhere on the tonearm? Any and all help will be greatly appreciated.
MarkView attachment 3537259View attachment 3537260View attachment 3537261

 

[sound hound]

Grace G-727 Gyro Master Stereo Tonearm or G-747. No sure how they are different one from the other. It looks like the knurled headshell screw is missing.

Vinyl Engine has it listed.

 

[Auditt4mark]

Grace G-727 Gyro Master Stereo Tonearm or G-747. No sure how they are different one from the other. It looks like the knurled headshell screw is missing.

Vinyl Engine has it listed.

Thank you very much!

 

[sound hound]

Have you had the counterweight off? It looks like there is a subweight on it, too.

 

[Auditt4mark]

Have you had the counterweight off? It looks like there is a subweight on it, too.

I have not. I haven't spent too much time with it until the cartridge\needle is rebuilt. Supex SD-901 Super high output moving coil. Should be in next week.

 

[sound hound]

I have not. I haven't spent too much time with it until the cartridge\needle is rebuilt. Supex SD-901 Super high output moving coil. Should be in next week.

Reason I asked was that the silver extension on the counterweight, apparently is a subweight added to increase tonearm mass or balance the tonearm with a heavy cartridge. Mine does not have that, nor is it shown in the Vinyl Engine listing. It may be that the Supex wants to see more mass than the tonearm normally has?