ID help...heavy iron looking object

[Chad1978]

I found this heavy iron looking object in my front yard, where I also found old bullet casings, I think my home was on a military base in mid 1900's. It is 7 1/2 inches wide and 5 inches length. Any ideas?

 

[50bmg]

waffle maker

 

[jadocs]

Almost looks like a step or foot rest for some type of vehicle.

 

[Snowmansta]

Any other markings besides the 504 on the back?

 

[Tony in SC]

Looks like a trivet of some sort?

 

[nhbenz]

Base to an umbrella stand perhaps
EDIT: Actually the tray from the base, check out the one here, see the picture of the tray removed: http://www.ebay.co.uk/itm/A-Antique-Cast-Iron-Umbrella-Stand-/172390034761

 

[Chad1978]

that's great, I would have never guessed it was from an umbrella stand, thanks so much!

 

[HuntinDog]

I was thinking a Zincoln sorter, but I'm going with nhbenz on this one.
Great ID