I was in the right place at the right time many years ago & bought 2 boxes of UNION OIL CO. labels.
They range in size from 2oz to 55gal. barrel wraps. Some are stamped on the back NOTED and then a date. The ones with Ring Binder reinforcements were mounted to paper when I got them.
The pictures that are foggy are mounted behind glass.
These are the Earliest 2 I have.
This is U.O. 1st Company Logo.