What years did remington start checkering the stocks, and go to the wider forend on the 870's? I found one without checkered wood, and with the old "Ithaca 37" foregrip (I call it this, due to it looking like a ithaca 37 foregrip, horizontal cuts) And it seems like its one of the first years of production, metal has a nice patina to it. The gun is about in 70 percent condition, due to metal finish wear (Age not abuse) They want 220 dollars for the gun, what are these early wingmasters worth?