John Shriver , Jun 24, 2006; 09:18 a.m.
The formula gives a deep tank time of about 9 minutes at 65 degrees F.
It's been aeons since any Kodak film data included DK-60a times. It was a developer aimed at the photofinishing market. There were two replenishers, one for manual, one for machine processing.
Some times from 1945, all in tank, all at 68F. Verichrome, 7 minutes. Plus-X, 7 minutes. Super-XX, 7 minutes. Note that this is from the era when 17 minutes in D-76 was the norm -- this is a highly active developer. I'd start with HC-110 dilution A times, maybe. Or maybe dilution B times?