CollectingSnapOn.com

i have an old snap on tool chest. from what i can decipher from the catalogs im fairly certain its a KR-56. by looking at the catalogs i can tell that its between 1948-1958, due to the logo being in the center and not to the side. but i cant find any markings, much less a date. any help?

Some boxes have a model number and date stamp on the back of the box. Also sometimes the rails are date stamped.