Digby Antiques (Wiltshire) has dated this piece to the 18th Century.

Marked to base with SP for Sam Pemberton.
It opens and closes well using the push button on the front.
Inside is a small glass scent bottle with stopper, slightly lose fit, so could be associated but it is the right shape and age for the etui.
The bright cutting is in very good order with very little rubbing. There are a few signs of wear to the top and base commensurate with age and use.
H 4.5 cm
W 3 cm
D 1 cm
Digby Antiques (Wiltshire) has dated this piece to the 18th Century.
You can view the stock and full dealer information on the Digby Antiques (Wiltshire) Profile Page