Need help to ID Snap On carry box

[454ragtop]

Picked this up today at the flea market. Went thru most of the catalogs and pics on the Collecting Snap On site, can't find it. It's about the same size as a KRA251A, but has a removable tray and unlike pics of the KRA251A I saw, it uses 3 conventional hinges rather than a piano type hinge. It measures about 18-1/2" x 6-3/4" x 5 ". Tray measures about 17-3/4" x 6" , and has lots of dividers for what looks like sockets. Has the remains of what looks like a pretty old logo decal under the hasp. Any ideas?

 

[454ragtop]

bumpity bump

 

[454ragtop]

Thanks to some help from the "Collecting Snap On" site I was directed to look at the back for a stamping, and found one. KR-250A from 1955. Figured I'd update this in case anyone else runs into the same thing.