Question on 4,7in American shell

[jozefb2009]

Hi,

Does anybody know the meaning of the following letters on this 4,7in American shell. The length is 420mm.

BHCO?
A.M. LOT ?
IFC?

What was it used for?




Thanks,

Jf

 

[highlandotter]

Used for coast defense and on naval ships. AMLot= production group number