[thekingofclout]

Originally Posted by MVSNYC

thanks! that helps alot...

here is a very quick summary from Mastro's book:

type 1- made from the original negative within 2 years of photo being taken
type 2- made from the original negative, years later
type 3- wire photos or photos made from photos within 2 years of being taken
type 4- wire photos or photos made from photos, printed years later

is this an accurate summary?

Yep! But there are a lot of subtleties and nuances involved with determining what TYPE a photo is at times...