British Columbia Haida mask/box

Description

A unique Haida box featuring a carved mask on the top portion and a carved out base
The mask portrays what I believe is a Ravens face and an elongated swan.
The eye and tail feathers of the swan a well as the Ravens face are highlighted with  Abalone shell
2 pegs hold the face to the base
The back of the base is signed "J" in a heart
the piece measures 12 1/2" long,10 1/2" wide and 6" tall including base
I can find nothing like this on the internet