Please help identify and age this russian box

This is a heavy cast iron box with a hinged lid. I know nothing more about it, other than it might be from Kasli ironworks. Might anyone know the approximate age?

 

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Russian, 21st C. is my guess. What are dimensions please? "Heavy" to me is too heavy to lift, so maybe it is a coal storage bin.

 

If you want another one-

http://www.ebay.com/itm/RARE-19thC-...075286?hash=item41b183bdd6:g:4U8AAOSwoudW5K~t

Funny, it has the same red ink stamp showing through the new black paint as on yours. Looks like a stamping made with a rubber stamp.

 

OTK (cyrillic) is an abbreviation for Quality Control Department.

 

I should rephrase that it is heavy for it's size. It is 2 1/2 inches high and 3 1/2 inches wide. It weighs close to 2 pounds.

 

I was not familiar with the Kasli iron works. Some interesting information out there! And since you said that it "might" be from there, the word "КАСЛИ" on the bottom is KASLI, so you can be sure it's from there. (Unless it was a fake or something.)