My resources are very limited, since they are only what other people have decided to photograph. There are lots of daab seen in 18th-19C Thai temple paintings. Yours are the first of any kind that I have seen from Burma, but that likely just means I haven't read the right books.
The earliest dha depiction I have found is from Angkor Wat in Cambodia, but the date is disputed. Angkor Wat was built in the 12th C, but many of the carvings were done. At least one authority believes this freize was carved in the 14th C, by Siamese artists following 12th C style books. What is doubly is that it shows mak as well.
