How to tell the version of VPI JMW tone arm?

I bought a VPI Aries 1 with JMW Memorial tone arm. But there is no version marker on the tone arm. I don't know it is 9", 10" or 10.5". There is a serial number 97-741 on the arm. Can someone tell me which version the arm is? Thank you.

cygnus_85911-06-2015 1:53am

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rauliruegas Details Discussions Posts This discussion 8,080 posts 11-12-2015 9:21pm Edit Delete Dear Cygnus: Here you can define ( in the chart ) which model you own. The other alternative is to email directly to VPI. Thank's and best regards.
rauliruegas Details Discussions Posts This discussion 8,080 posts 11-12-2015 9:22pm Edit Delete Sorry, this is the link: http://www.vinylengine.com/vpi-tonearm-geometry.shtml