timepieceshoppe.com
Pivot Repair Gruen Veri-Thin 420SS circa 1943 | Antique and Vintage Watch Repair
Here is an example of a pivot repair on a 1940s Gruen Veri-Thin. As seen in the picture, the upper pivot of the center wheel has deep groves worn for years of running, perhaps without lubricant. This is tricky repair as this calibre has a center sweep second hand, and the center post is hollow.