A good sized sprung linkage/pulley for a wired servants or front door bell. Don't see many of the sprung ones, it helps return the bell and pull over a long distance. We've just given it a light polish, the roundel on the front is a later addition. The long arm in the main picture moves up to just past the right screw hole and the loop on the end is adjustable.
Condition:
Overall great working condition.
Finish: Brass Diameter of roundel: 51mm (2in) Length main arm to centre: 110mm (4.25in) Fixing plate size: 86mm x 70mm (3.25in x 2.75in) Stock code: 1530/D/3/A