As far as I can tell, the best photo's available are those at
http://www.maritime.org/tdc.htm but I cannot read any of the labels on the machine
The answer, I'm sure, would be in:
The Fleet Submarine Torpedo Data Computer
by Harvey G. Cragon (134 pages)
Cragon Books; First edition (November 23, 2007)
ISBN-10: 0974304530
But Amazon is out of stock. Anybody care to check their local library?