I think your button is civilian fashion or maybe a career uniform one. Here's a link to one by the Waterbury Co. that is similar but not an exact match.
It's difficult to see in the photos, but below the crown is a Torse... which in Heraldry is a wreath viewed on edge, always laying horizontally, having six twists. Button-collectors call your find a Livery button... which shows the Family Crest of a wealthy or noble family, and was worn on the uniforms of the household servants (butler, doorman, coachman, etc). There are many hundreds of emblems on of Livery buttons. To see them, and search for yours, go to the following webpage, and look through the Categories (listed on the left) for the animal on your button. By the way, the headgear on your button is not a crown, it is a coronet. https://sites.google.com/site/liverybuttonsidentified/
Your button is a 2-piece stamped-sheetbrass button (missing its back). That means it dates from no earlier than the 1830s. Unfortunately, without its back there is no way to time-date it. Livery buttons were plentiful in the 1800s, less so in the early-1900s, and are rarely manufactured since then.
From Wikipedia:
The griffin, griffon, or gryphon (Greek: γρύφων, grýphōn, or γρύπων, grýpōn, early form γρύψ, grýps; Latin: gryphus) is a legendary creature with the body, tail, and back legs of a lion; the head and wings of an eagle; and an eagle's talons as its front feet.
You might do better in the future, to post your unknown finds in the what is it forum near the top of the main page, especially if they are not civil war era. They will get more exposure and more replies.