Type 1-2-3-4 Photos what's the difference?

Type 1-4 Photo Guide -

What does "Type 1" actually mean — and why can it change a photo's price 10x over? This guide breaks down the difference between Type 1, 2, 3, and 4 vintage photos, the physical clues (stamps, paper stock, sharpness) that reveal what you're really looking at, and how authenticators like PSA/DNA and JSA approach photo verification. A must-read before you buy or sell vintage sports and press photography. Instant PDF download.