Pfaff 545 timing
Keep in mind that there are two needle systems for the 145, 545 and 1245. If the machine is an H3, it will take a 134/35 needle. If it is an H4 machine it will take a 190R needle. The H3 machines have a dual spring bar across the top of the machine. The H4 machines do not.
That could be why the hook was in the middle of the eye. The 190R needle is longer than the 134/35.
The timing is the same, just remember to adjust your stitch length to 0 before timing and adjust it back to sew. This is as critical as the measurements.