We’ve actually been there, and know this to be the main road.  The card was mailed in 2020 with two different stamps (one just a little bit disconcerting) and postmark, with some orange postal barcoding.  Trivia point:  you can write the city’s name as Yogyakarta or Jogjakarta, and both will be right.  Don’t confuse either one with Jakarta, which had been written as Djakarta but not Yakarta as far as we know.  Grade: 1