1918 luger pistol

my uncle just died and left me a 1918 luger pistol. I would like to know everything i can about it. i don't know anything about pistols, so i really need help.

the gun appears to be in very good condition. it has 1918 stamped on top of the barrel. the number 21 has been stamped at several locations on the gun and at one place 121 is stamped. the numbers 88 and then what appears to be a small 8 are stamped underneath the barrel.what appears to be initials are engraved in a fancy script on top of the place a bullet would enter the barrel.it is strictly a guess, but the letters look like DWC. the word geschert is stamped where the safety lever is located. What looks like a small eagle or bird is stamped on the (action?)then 4 small figures, maybe men or chess pieces are stamped on the gun, probably not stamped, more like engraved, like the 3 letters.the first 3 men or pieces have what looks like a crown on top of their heads and the 4th figure is facing me with his hands up (this is only what it looks like to me)the clip has a piece of wood on the end which is recessed so that a finger can be placed on it to pull the clip out. the gun looks like a 9mm and the barrel looks like it is about 3-4 inches long. thats about all i can think of.i would sure appreciate any info you can give me. thanks in advance. larry f. klang