Starrett Narrow Hook Rule No. 330-6 inch
This is a nice old 6" narrow hook rule, marked "THE L.S.S. CO. ATHOL MASS NO. 330 TEMPERED NO. 10". It is only .21" wide x .044" thick. It's in good++ used condition with some minor staining spots, no rust, a few tiny areas of minor pitting, good markings and inch graduations on both sides, no owner's marks. A very hard to find steel rule!