83 sc timing marks
 

I thought I understood this but not so sure now.

Of the two marks at TDC on the crank pulley I always thought the mark on the left is Z1 and the mark to the right is 5*BTDC. The pulley rotates cw right?
But when referring to the Bentley it appears the mark to the left is 5* BTDC and the mark to the right is TDC.
Have I been looking at this wrong all along? No doubt if I am wrong then the timing is not right but still the engine seems to be running fine.
Could you please enlighten me?
Hugh

i have never seen a Bentley book..as you said the left is Z1 and the right 5...like this
Ivan
https://www.pelicanparts.com/techarticles/101_Projects_Porsche_911/23-Timing/23-Timing.htm

Thank you Ivan. So it is as I always believed. The reason I questioned is because on page 0310-12 on the Bentley manual there is a diagram showing the opposite. An error, obviously.
Thanks again.

never mind I see the year is in the thread title.