[bn2cardz]

I am a clean slate. I have never bought one or know anyone that collects them, but I find them very interesting and have been wanting to start.

I have always found vintage photographs interesting, but there are so many of them I have never known where to start. I am looking for a good resource to find information about vintage photos and how to discern the different types (type 1 - type4).

In particular how can someone tell when the photo was made?

What characteristics are PSA/DNA looking at to make their judgement?

Are there any good books and/or websites that are great resources to educate myself on this large spectrum of collecting?