I have a small gold knife, 2-3/8 in. closed, blade length 1-5/8 with a gold bail and a monogram M. It shows Meriden Kife co. which was in business between 1917-1932. Anyone know what kind of value to assign>

Welcome to AAPK.
According to the book, Meriden Knife Co., 1917-1932. Founded by the owner of Colonial Knife Co. Made skeleton knives for handling by other sources. (in this knifes case, possibly a jeweler) May have had some association with Miller Bros. I do know that Miller Bros. produced alot of Fob knives in their day.
Value is always whatever a buyer is willing to pay. These small fob knives average around $8-$12. Depending on rarity, it could go a bit higher. It's been my experience that ones with unused monogram panels, tend to sell for a bit more then monogrammed ones.

WB

Thanks, very helpful information.