Iron box thas says "check" on it any ideas?

[silversnacher]

There is no bottom,I don't know if there ever was or if it was mounted on a wall? Some sort of an electrical box? Thanks!

 

[bigfoot1]

mail slot.hotel key drop..my best guess

 

[DoranHashemi]

Might be a payment box.

 

[silversnacher]

Someone else thought it was a coal box door or something of that nature, and they would check if there's coal or something? You guys agree?

 

[comfortably numb]

Looks like it mounted on a pipe, Sewer cleanout? Inspection cover of some sorts.

 

[diggummup]

Damper door for a stove, probably industrial in nature versus a home stove or furnace.
Here is a similar one-

 

[silversnacher]

Looks like it mounted on a pipe, Sewer cleanout? Inspection cover of some sorts.

Crap...that'd be nasty

 

[Paleopilot]

Stove door, for checking the ash level.

 

[bigfoot1]

very cool...looks solved..ash inspection door...great job guys