The postcard shows an oil on canvas painting by Antonio entitled Candle Vendors. I, however, found two Filipino painters with the surname Antonio, actually father (Angelito Antonio) and son (Marcel Antonio). But when I compared the style of painting, I believe the artist of the painting is Angelito Antonio. I, again, couldn't find additional information about the painting nor its location (private collection or museum).
Angelito Antonio was born in Malolos, Bulacan on February 3, 1939. The son of a UP Fine Arts graduate, he gave in to parental persuasion and spent an unhappy semester in the MIT College of Architecture before shifting to painting at the UST and graduating in 1962. The following year, he held his first one-man show at the Philippine Art Gallery. Since then, he has held several other group and solo exhibitions in the Philippines as well as in Saigon, Australia, Hong Kong, the Hague, and the United States.