Hamilton 16 Size Friction Balance Staff

This is a Hamilton 16 size friction balance staff. They are sold one (1) at a time.

Please note: these staffs have not been measured. They could be for 992B (5.67 MM long or 0.233 inches)  and/or 992E (Elinvar 5.33 MM long or 0.210 inches). However, it is a genuine factory Hamilton 16 size friction pocket watch staff.