Introduction to Old Photos

I found the following photos at My Chau Art Gallery on Le Cong Kieu Street, District 1, Ho Chi Minh City in 2007-2008. I don’t know the circumstances that led to their being for sale ($1 each), but if you know the people in the pictures or anything about how they photos got to be for sale on the street in the 21st century, please let me know. (And if they belonged to you, please let me know.)