My sister just went garage saling today and came back with a bunch of old layout tools Starrett, lufkin and BS. The guy said she could buy the lot for 5 bucks. Anyway there was a Starrett tool Model number 457, I dont know if it is all there or what it is. Does anyone have an old catalog who could tell me what it is. It is a small steel block with a place for a rule to go through and then there is a pointer that point to a graduated scale. The graduations a from 0-10. Any ideas. Andrew