Safety works as it should and button opens it up. Blade is 3 total length is approx 7 1/2. Tang reads Shrade Walden NY USA.
My model numbers came from research. WW II maybe Not sure if correct. I believe a military knife.Para trooper , I had the knife a long time. The item "Vintage rare Shrade Walden N Y USA Push button lock pocket knife 155 or M2" is in sale since Sunday, January 27, 2019. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Folding Knives\Vintage Folding Knives\Factory Manufactured". The seller is "gotcha_6" and is located in Knoxville, Tennessee.
This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Sweden, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Norway, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras.