Hello!
I recently found what I believe to be a Keystone Lubricants Salesman Sample Kit at an estate sale. From what little information I have found on the company and based on the maker's mark on the jars I think it might be from around the 1930s?
Other than that and the fact that they were eventually purchased by Total, I know nothing.
It's an interesting item so if anyone knows anything about the company, the sample kit or the value I would really appreciate it!
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