Looks like smooth calfskin in navy blue !
I just acquired a similar one 3 weeks ago.
As far as I know, the leathers of Celine's box bags come in: smooth calfskin, liege, goat,
spazzolato and the exotics (python, stingray, croc, etc.).
Smooth calfskin and spazzolato tend to scratch very easily
and goat and liege seems to hold up better.
I have a liege, goat and smooth calfskin boxes and I tend to gravitate to
the smooth calfskin (it IS a beautiful leather for the box) !
Hope this helps and hope you keep yours !