Snap On top box ID help

[faiee]

Hi all, hoping for some help in finding the ID for the top box in these pictures. I have the bottom ID but would like to know the top one and whether it is genuine or not. It doesn't have any stickers on the side?
It appears to have the older style bronze coloured key.

Thanks very much.

 

[1950mercury]

Typically they have a model number stamped on the back

 

[454ragtop]

My catalog shows 2 that look identical, KRA2007 and KRA4055. Awful shallow, less than 15" front to back.