I loved traveling through Southeast Asia in the 1990s because so many places seemed like they hadn’t changed in decades. Vietnam was one of those places and Cambodia another.
Take these hand-written boarding passes. My mom used one in 1965 and I used the other in 1991.
We both flew Vietnamese airlines to and from Phnom Penh, and then went on to Siem Reap to see Angkor Wat.
Can you tell which pass is from which year ? (If you click to enlarge, the caption lists the year.)