TA21 Distributor micrometer adjustment

The micrometer adjustment on the distributor has quite distinct segments stamped into the shaft. What I am seeking is the number of degrees (either advance/retard) that each segment represents.  Richard Melbourne Posted by RichardWallach 12/03/2015 09:24:39

I think that each division of the scale represents 2 degrees of distributor rotation (equivalent to 4 degrees advance / retard at the crankshaft since the rotor arm turns at half crank speed). But I have never checked it out! Posted by drdowhitt 15/03/2015 22:26:26