Don,
Nice! Whoever made those grips was no stranger to carving ivory. Very well done. The style would indicate that they probably are close to contemporary with the gun. Later ivory grips usually have either a germanic oak leaf pattern or oriental dragon motif (I have a set of dragon ivory grips stashed someplace if I can ever find them among all the little boxes I still haven't unpacked.
Thank you for remembering to post them. It is always a joy to see neat stuff.
Ron