Fill in the Blank (482 Views)

6f: 1:11
4f: 0:45.6
2f:

I was looking over some files I have in cloud storage when I came across some very old universal pars once used by a well known figure maker in New York.

The 4f and 6f times listed above are parallel on his chart. I'm curious if anyone has an opinion what the 2f time should be based on the data provided?