Vintage circa 1978/81 Buck Knife on sale 506 White Knight pocket knife with "white" Micarta composite handles, steel bolsters, great condition

Research shows this Buck Knife White Knight model 506 is a pretty rare little Everyday Carry lock back pocket knife with what is sometimes referred to as a Script tang stamp but really just a Olde English letter on sale B and lower case letters. The handles are a composite material called Micarta that's supposed to be white but has mellowed and steel bolsters. The blade, though used, is in great condition that is 1 5/8" with light scratches from use. This originally came with a small sheath but has gone missing. Rare find.