The Soldier Swiss Army knife started to have dates on the blade tang sometime in the late 1910s or early 1920s (the earliest date we have found is 1922). Knives from this period are relatively uncommon.
Size & Weight: The 1920s Soldier knife is 100mm (3 1/2") long, 25mm (1") wide, and 18mm (0.72") thick. It weighs about 121.7 grams (4.3 oz).