VINTAGE PARTS FOR A WATCHMAKER'S OR JEWELER'S LATHE.  26 PIECES IN TOTAL.  ALL ARE ABOUT 6 MM.  MOST ARE UNMARKED, BUT THE ONES THAT ARE MARKED ARE ALL  DALK.  AS FAR AS I CAN MAKE OUT.  THERE ARE 21 REGULAR COLLETS MARKED 4,6,7,8,14,15,16,18,20,22,23,27,31,36,40,57,99- AS BEST AS I CAN READ THOSE LITTLE NUMBERS.  THE 4 STEP COLLETS ARE MARKED 1,2,3,4.  THE FACE PLATE IS 3 3/16" IN DIAMETER.