This is a vintage Antique Brown & Sharpe mfg. Co. Providence R.I. USA 14 piece inside Micrometer 265 Set in its Brown&Sharpe Case . It has measuring rods for 1 to 2" , 3 to 4" , 4 to 5" , 5 to 6" , 6 to 7" , 7 to 8" , 8 to 9" , 9 to 10" , 10 to 11" , 11 to 12" . Used for measuring inside diameters inside bore mic type measurement . Looks to be in great shape for its age , case is very nice . Any questions please ask and thank... you once again for your support .