Bakelite Netsuke Figures? Cherry?

I came across these figurines that are approximately 2" x 1" (each one varies slightly in its actual size). I notice that most have two holes on their bottom underside but some do not. Some appear to have more transparency than others. I am just wondering how I would be able to determine the age of these pieces and any other information about them would be very helpful. I do believe that they are made of bakelite, possibly cherry bakelite?

Any information regarding these little figurines would be very helpful and greatly appreciated.

Thanks!