[Milsurplus] ID Navy Autotransformer

[Rob Flory]

Hi,

I was deep digging in my garage and pulled out what I had been assuming was
a low-voltage transformer.  On cleaning I found the terminals labelled
0-115-190-200-210-220-230-240-250 with continuity all the way through.  It
looks to be in the 500W class.  On removing it from the steel box it was
roughly cobbled into, I spotted the Navy anchor stamp.

It strikes me as something to run 115V equipment off of a
not-well-controlled 220V supply.  I can see in my mind's eye three of these
things in a row on a bulkhead, perhaps to bring the 3-phase ship's power
down to 115V

No nomenclature I can find.

Has anyone run across something like this?

RF
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