Sturmey-Archer Indicator Spindle (Chain) :HSA125 (mark 1 or I) : lenght 49 mm ;HSA126 (mark 2 or II) : lenght 56 mm ;HSA315 (mark 3 or III) : lenght 59 mm ;HSA316 (mark 4 or IIII) : lenght 62 mm ;HSA420 (mark 5 or IIIII) : lenght 66 mm ;HSA615 (mark 6 or IIIIII) : lenght 40 mm ;HSA716 (mark 8 or VIII) : lenght 75 mm ;HSA715 (mark 9 or IX) : lenght 69 mm ;
The lenght is from the shoulder to the thread, on the smooth surface with marking ;