On the underside of the arm tube (see Photo 7). There are some scratches here and there, and particularly noticeable on the counterweight (see Photo 5) and the base of the armrest (see Photos 6, 8 and 11), but overall, the condition is still lovely. This tonearm is in full working order , and the counterweight has NO sagging. You can put this tonearm to use as soon as you get it.The item "Ortofon RMG 309 Tonearm Early Version Serial #16378 Excellent Condition for SPU" is in sale since Wednesday, July 1, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Parts\Record Player, Turntable Parts". The seller is "tubiophile" and is located in Hong Kong. This item can be shipped worldwide.