Glenn’s Computer Museum
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The museum is incomplete: the last change was on 9/11/2014. A change log is here.
World War II gave rise to some amazing electromechanical computers used by the military.
The most impressive was the Navy's Mark I and Mark 1A fire control computers
used on battleships.
A great reference to this device and many similar electromechanical fire control devices
can be found in this site.
Figures 1-3 show a "Powder Fuze Ballistic Ccomputer". The device is labeled as being for a Mark I computer, and there is a clear picture of this component in the maintenance manual for the Mark I.
Figures 4-5 show a second component that I think comes from a Mark I, but cannot prove it.