When low mass tonearms are mentioned from  the 70's, three tonearms come to mind: The Grace 707, the Infinity Black Widow and the Mayware Formula IV.  Of the three, the Mayware is the only uni-pivot.  

Some people love uni-pivots.  The theory being, the less bearings, the better.  With the Uni-pivot you have one and it's not really even a bearing at all.  It is a pivot point.  The type often seen on turntable top brushes.

Who this arm is for:

This tonearm is a collector's item.  You should be fairly familiar with setting up tonearms or this one will frustrate you.  It can be a bit fiddly but if you know what you are doing, the rewards are worth it.  If you like messing about with your turntable, you might have fun with this one.

This arm is not for the new audiophile who barely knows what a uni-pivot is.  It is a low mass arm which means it tracks very lightly and it plays best with high compliance cartridges.  If this sounds  like Greek to you then you might want to pass or have a tech set it up for you.

Some suggested cartridges for this arm are the ADC XLM, Sonus, Ortofon M15/20e, Shure V15, and Pickering XSV3000.

I will include my Ortofon M15E cart with it.  You would just have to provide a stylus.  This cart is a great match for it.

Addendum: there have been reports on the internet that you need the XTC counterweight to adjust the azimuth on this tonearm.  That is not necessarily true.  While the XTC does do a good job, the stock counterweight does it also just fine.  The method is documented in the user manual and can be found on Vinyl Engine.  The stock counterweight is low slung and it can be rotated as to offset the azimuth balance.   The XTC is not needed to do this.