Jelco have made arms for most manufacturers in the past. Their Japanese engineering is second to none (think Lexus). They made the famous Sumiko MMT and we believe the Linn Ittock II as well. These are some of the companies that marketed Jelco arms under their own names: Koetsu, Sumiko, Audio quest, Linn, Oracle, Ariston, Roksan, Revolver, Mission and Graham. Jelco make their own jewelled bearings, they are in complete control of quality.