Kingsdown Antiques has dated this piece to the 1900s.
Measurements:

Diameter of compass: 5/8" (approx. 1.5cm)
Length of chain: 18" (approx. 46cm)
Measurements of box:
Height: 1" (approx. 2.5cm)
Width: 2 3/8" (approx. 6cm)
Depth: 2 3/8" (approx. 6cm)
Total weight: 65g
In good condition.
Kingsdown Antiques has dated this piece to the 1900s.
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