Buddhist Sites of India Postcard Set (4 postcards)

This was received during a visit to the Japanese Temple in Bodh Gaya, India, over 40 years ago. It has been stored away in a storage box for a long time.
From the upper left of the photo, clockwise:
① Sarnath Dhamek Stupa, the holy site of the Buddha's first sermon
② Ruins of Nalanda Buddhist University
③ Lumbini Maya Devi Temple, the holy site of the Buddha's birth, and the pond where he is said to have taken his first bath
④ The summit of Vulture Peak (Rajgir), where the Buddha is said to have preached the Lotus Sutra, the Sutra of Contemplation on the Buddha of Immeasurable Life, etc.

The address side has stains and yellowing commensurate with its age.