Rare Antique Initial locket with Soldier Photo circa early 1900's?

This locket is either made out of actual gold or somekind of golden metal, it has the initials EKM ornately carved in the center of the locket with a 16 point star carved around the initials. Has a 20 inch chain also made of the same material with a small flower ornately carved into the bottom of the chain in one of the links.  Back of this locket has tarnished some around the edges. The chain is unique each link is approx. 1/2 inch long  and are in the shape of long golden corn husks.  On the side of the locket on the right side there is a photo of a young white man uniformed soldier carring a rifle.he  He is wearing a hat and a uniform coat and gloves.  The photo is in great condition, black and white with original plastic cover over the picture, it has yellowed.  The picture is approx. 2 inches tall.  On the left inside of the locket there is a stamp in the gold that looks like a policebadge with the letters FM and what looks like an O underneath the FM. This is a very beautiful locket and I just wanted to get an appraisel and info on it, hope someone can help.