Depending on EXACTLY what you have and its condition, the range could be from a few hundred to multiple thousands of USD.
100-1000 depending on specifics
Without more specifics, 10-1000 USD
The value of any firearm is based on the exact make, model and condition. Your Walther self loading (selbstlade) pistol has some degree of collector's value, which will be driven by condition. You will need a hands-on appraisal. Take your pistol to a local gun shop or gun show. There were at least 4 different versions made, and values are typically several hundred dollars- again, based on model and condition.
make should be stamped on pistol
Value of ANY gun is based on the exact make, model, and condition. Unfortunately you have given us none of the 3 things we need. Selbstlade is not a brand name- it is German for "self loading". We know that you have a German .25 cal automatic pistol- but that's all. Sorry-
Can't be answered without a detailed description of the weapon.
Question can't be answered as posed.
In poor condition $95, in excellent condition (near new) $370
Well, there is a problem with your question. You see, selbstlade is not a brand name. It is German for "Self Loading". In other words, an automatic pistol. And there were several guns that COULD be yours. If you can repost with ALL of the markings on the gun, and it's condition, we may be able to give you a rough idea- but without knowing make and model, we can't.
In 1942? Highly unlikely, given that things tend to be simplified in wartime, rather than manufactured in a more expensive manner.
maybe 100
He applied for the patent in 1835 and received it on 25 February 1836
The Walther Selbstlade ("self-load") Pistole is known as the Model 1 since 1914 (when the Model 2 appeared). Carl and Fritz Walther began marketing the gun around 1910, a patent having been granted in 1909. It is a short-barrel automatic chambering the same 6.35 mm cartridge as the 1906 FN Browning, and of a similar design to the 1900 Steyr-Mannlicher pistol. There are 5 distinct variants made between 1910 and 1915. The age of a particular example is impossible to answer without a detailed description of ALL markings, caliber, barrel length, finish, condition, box, accessories, papers, etc.