Boxes #20 & #22. Notice how the last number 1 in the year 1961 is darker than the rest of the stamped date. Explainable or doctored?
My take? That’s clearly a STAMPED date. The “1” had more ink on it and was therefore slightly darker. Therefore, the scanner choose to bring that in as a black numeral vs gray.
Same thing on the anti-aliasing throughout the document.