US WW2 Navy Gun Powder Sample Tank

In a very good condition and hard to find a US WW2 MK1 Navy Replacement Sample Powder Tank.
The tank comes in Aluminium and is nicely maker marked and 1945 dated.
In a tradition dating from the earliest days of smokeless powder for the big guns, the Navy felt it was necessary to have samples of the powder exposed to the same heat, humidity, and motion as the powder loaded in the cartridges. These would be checked periodically to make sure the powder was not deteriorating in potentially dangerous ways. Therefore they had powder sample tanks in many of the magazines on ships, especially larger ships like cruisers or battleships that still used bag type charges instead of brass cases.
A very nice tank for display!