Most likely french ivory (Celluloid) bangles

Being back on CW I'm warming up with two new posts:) . Bought a pair om bangles the other day. I was unsure of what type of plastic it was, but after some research and discussing with fellow CW friend Mary I think this is celluloid. The bangles have that smoth touch like bakelite and sound but don't look carved, so not bakelite. Looks like french ivory that I have seen in other pieces online. Bought them in an antique shop and as usual here in Scandinavia, they (we) don't have a clue about early plastic. The bangles are about 3,4 cm wide, so quite big. If you have or have seen something similar please let me know. I don't know the age of them other then that they are vintage.
They will anyway match nicely with other bangles.