Well-Tempered Golf Ball?

The golf ball has an important role in the golf game. It is specially designed for golf games. A golf ball needs to take into account some technical features, including dimples on its outer surface, that does not weigh more than 1.620 oz and have a diameter of not less than 1.680 inches. These features help to create swing and a good flight. Most golf balls have about 250–450 dimples, although a regular golf ball has 336 dimples. Golf balls are made by combining 1 to 5 pieces to form separate layers. Check here

The arm is damped by having a part with a large surface area partially submerged in a viscous fluid.  A golf ball is a ready-made object for that purpose.  Although it has a lot of mass, the ball is at the pivot point so it does not have a lot of inertial mass.  

I just realized that this thread is a resurrected thread from about 10 years ago.  It looks like they have done away with the golf ball, or at least made a machined aluminum cap to disguise the "science project" appearance.  
I was a happy owner of the original WT turntable about 10 years ago.  It was a bit finicky to get the adjustments just right, but it sounded great, and wasn't very expensive.  
I personally favor function over form, but there is no doubt that if you don't like the appearance of something you should look elsewhere.  Fortunately there are TONS of great TT options out there.  All I know is WT is a great turntable.  

The newer models have a half golf ball covered with the silver cap. I am a owner of a WT. Amadeus Mk.II. I realize a lot of people are put off by the golf ball and fish line approach, but that, along with a unique style platter bearing, make for a very musical presentation that few standard style (and much more expensive) turntable tonearm combos can match or exceed. IMO

The newer models have a half golf ball covered with the silver cap. I am a owner of a WT. Amadeus Mk.II. I realize a lot of people are put off by the golf ball and fish line approach, but that, along with a unique style platter bearing, make for a very musical presentation that few standard style (and much more expensive) turntable tonearm combos can match or exceed. IMO

I agree mr m1. 
I half joke that they put the cap on the golf ball on the MKII (which I own) because wives would take one look at the table and say "You paid how much?!?" :)