Serpentine Antiques has dated this piece to the 1880s.
The ivory is a mellow creamy colour and it is mounted on the front cover with an unmarked silver shaped and pierced cartouche engraved with the owner's initials.

Size-4.25 inches long by 3 inches wide by .5 inches deep.
Weight for shipping-80 grams.
The interior has a holder for a pencil (not included).
Some of the silk lining on a couple of divided compartments is fraying a bit.
It is in good condition overall, with a very nice patina, grain and colour. A nice addition to a collection.
Serpentine Antiques has dated this piece to the 1880s.
Specialising in unique pieces for the discerning individual, selected and prepared with special care..
You can view the stock and full dealer information on the Serpentine Antiques Profile Page