Essential Audio wrote :
Regular Jelco tonearms make use of a tip bearing in the vertical axis, whereas the Feickert runs on a special type of ball bearing. This improves bass control and gives more punch. Additionally, it has an oil damper that the regular Jelco arms do.
Interesting. The Jelco 10.5 S arm listed on Puremusicgroup webpage mentioned about using gimbal bearing in the vertical axis and oil damping ( i can confirm this) too.
Hmmm..Both parties mentioned about the arms being build to their own specifications but they look identical and the quoted spec sounds similar too.