Way to little information. What kind of Colt Revolver? Single Action Army? Python? Diamondback? What condition is it in? A set of new ivory grips with a steer head would set you back 800 or so.
Provide a detalied description of all markings, take it to a gun shop or gun show.
check: antiquegunlist.com
The gun was an ivory-handled .44 Webley British Bulldog revolver.
you can use ivory for jewelry, carvings, handles for things like swords and even they use to make the keys of a keyboard out of it. You can also use the ivory/ tusks for antiques...
Impossible to answer without a DETAILED description of ALL markings and pictures.
becuasae they think it's rare and beautiful but to get that ivory, they have to kill elephants They use it in commercial products, a classic example is the piano keys on older pianos.
I have a friend who has a 32 cal, break open hammerless revolver, chrome finished, in excellent shape. As near as the person who had it remembered, it was perchased around the early thirties. It is stamped American Revolver co. with ivory grips.
value depends on overall condition................
250 USD
If it letters as leaving Colt that way, quite a bit. You are in the 500-1500 range
Originally, Ivory as a dentine type material & tough enough to withstand many years of use/abuse, was used for piano keys as well as handles on many tools & utensils. With the invention of plastic material & the need for animal conservation, ivory has become illegal to use.
Could be 100, could be 1000 or more. Depends on specifics that you don't provide.