Most visitors online was 1990 , on 7 Feb 2022
Is there a link to David L's micro photo?David L. posted a micrograph of a pivot that was sheading it's plating. This was the best illustration I have seen.
I would guess most of these movements have made there way to the bone yard by now.
There is much controversy about exactly what the plating is. Some of the early 70s clocks appeared to have different kinds of plating. I have a photo of the white powdery 'frost' that often appeared, looked like cadmium or zinc oxide??
Re-pivoting, or new parts, are the only things that have worked for me.