These are the spring-loaded pivot hinges that mount the acrylic dust cover to the plinth. Condition: Excellent — both hinges are matched, complete, with pivot pins intact and hinge action smooth on both sides.
Condition: Clear acrylic with light-to-moderate surface scuffing throughout, typical of a 45+ year old cover — visible under angled light, not obstructive to the view of the platter in normal use. One minor crack/chip located along the front lower edge (see close-up photos) — does not affect fit or hinge function.