What does HP-35 Red-Dot back look like?

[pebinord]

What does the back of an original HP-35 Red-Dot look like? Mine has no lower label; the molded-in recess is present with no sign of tampering and no sign of adhesive residue. The larger upper panel does not say "Made in USA" nor "Patent Pending" across the bottom edge. There is no serial number present, not even inside the battery compartment. Are these attributes authentic? (Given the scarcity of this version it would be very helpful to find such pics in the exhibit hall :-)