(Note: Measurements are outside max. dimensions unless stated otherwise).
20th Century : End plate component for a pivot stay.
Option : Two 3/4" No. 6 slotted countersunk colour-matched brass screws.
Width 45mm. (1 3/4")
Height 33mm. (1 5/16")
Thickness 1.5mm. (1/16")
Depth of pivot arms 14mm. (9/16")
Diam. of pivot hole 3mm. (1/8")
Possible origin - bureau fall.