Antique Carved Ivory Cigarette Holder with Leather Case

An antique cigarette holder hand carved from pre-ban ivory. The carvings are nicely done with a plant motif and what looks like an iris flower. The mouthpiece is removable, as well. Come with what appears to be its original leather case, with white and green velvet interior. Estimated age is early 1900s. 

Appears to be in good used condition. It has not been cleaned. There is still tobacco/ash residue in it. The stem appears to be near original as well. 

3 1/4 inches long, about 5/8 inch wide