I'm 75 years old and found my Dad's or Grandfather's Schrade in a special box. It's an Uncle Henry 285UH 2-Blade Pro Trapper Pocket Knife serial number 94878. It's in nearly new condition. Just wondering how to find it's approx. build date. At the base of the main blade it's marked "Shrade Stainless 285UH" and "Stainless" on the other, not the SCHRADE+ like most I've seen. Wish I could post a picture......