Having to downsize my collection.
Completely disassembled and cleaned the lens in 2021. Relubricated it with Japan Hobby Tool #30 grease.
Focusing and adjusting the iris is exceptionally smooth, and all blades are clean of any previous oil.
The front filter has had damage since the time I bought it.
The glass has four "cleaning marks" on the front element, but does not affect picture quality at all (see last picture for an example taken with this lens).
Any dust on the glass will be cleaned before shipping to the prospective buyer.