This bookmark was made in the US by Whitehead & Hoag of Newark, NJ. It is a celluloid advertising bookmark for Vail Bro's Tooth Powder. It is in the shape of an owl. The back says "Ideal Tooth Powder, Should be had everywhere, or send 25c. to Vail Bros., 816-818-828-822 Cherry St., Philadelphia." The date is 1900 - 1915.