Digby Antiques (Wiltshire) has dated this piece to the Victorian era.
7, 8, 9, 10

I understand that this may have been named after Queen Victorias daughter Beatrice. I think it was made by Avery.
Shuts well and really is in great condition.
Overall measures 4.8 cm height x 2.5 cm depth 0.8 cm
Length when open 14.5 cm
Digby Antiques (Wiltshire) has dated this piece to the Victorian era.
You can view the stock and full dealer information on the Digby Antiques (Wiltshire) Profile Page