Press Button Knife Co Medium double etched FIRTH'S STEEL antique automatic knife

Antique Press Button Knife Co Medium double jigged bone etched FIRTH'S STEEL automatic knife made in Walden, NY between 1892 and 1923 at the Walden Knife Co. The knife measures 3 3/8 inches closed and just over 7 inches open with brass liners and nickel silver buttons. The Spear/pen blades are 99% full, or better with original finish with light patina, and a little light peppering and both tangs stamped PRESS BUTTON KNIFE CO WALDEN, NY and both backsides are blank which means this one was likely made between 1913 and 1923. Spear blade etched FIRTH'S STEEL, but a little hard to read in spots and VERY hard to photograph. The jigged bone scales are in Excellent condition with no pocket wear and no cracks. The knife works well with both blade tips well below the liners closed, both open fully with occasional kickback and both lock open tight. EX+ condition!