I recently understood what the second number 
written on some cels means. For example, for X-
The movie, the cuts are numbered from 1 to 1376, 
that’s why I have some cels numbered C564 or 
C1374 (C stands for Cut !). But I was wondering 
why this number was not written on every cel. I 
would accept the Cut number being only written on 
key cels, but I also have an A4 key cel on which 
it’s not written, and a C14 (this C doesn’t stand 
for Cut !) cel on which it’s written !! Is it 
kind of a random thing ?  Or is it written when 
there is a corresponding genga – but I thaught 
that gengas would only make key cels ??- ?? If 
anyone knows, please answer :)