Boker Damascus Base?

[Charles Stevenson]

Would anyone happen to know the base steels used in Boker's Higo Kinzoku Damascus friction folder? A friend bought one for himself and was curious as to what quality of steel they use in these

 

[KenHash]

Unfortunately Boker does not seem to disclose the steel type anywhere. Being that it is made in China I would expect that whatever it is, it won't be too exciting. My guess would be 7CR17. But that's just a guess.
The "real" Higo maker Nagao also makes a damascus Higonokami using Aogami 2 core and 16 layer damascus.

As a side note the Boker Higos have written in Japanese - 素敵な金属工具　Sutekina kinzokukougu - A fabulous metalurgical tool
the kind of odd ball "Japanese" writing often seen on M.I.C. copies of Japanese knives.