[mrerick]

Do what you can to stop and stabilize the active rust pitting and oxidation. A good cleaning and lubrication can be followed by using "0000" steel wool that is well oiled to carefully remove red iron oxide rust.

There should be a year stamped above the chamber on the receiver. That would be the year of manufacture. What is stamped there? Perhaps 1916?

In the USA, an LP-08 artillery Luger in original finish and 85% finish condition that is mechanically sound and functions properly would sell for at least $1,500 between collectors. More at retail sale from a shop.

Is the magazine numbered to match the gun? The serial number is on the front of the frame above the trigger guard. If matching, it increases value about 35%.

Try and get a digital camera and tripod, then take pictures in natural shaded light. Use the self timer to eliminate camera shake, and try and get sharp focus pictures, then re-post them with details of the proof marks and other stampings visible.

There were a couple of types of sights on these guns. Adjustable and non-adjustable.