Bergognone (active 1481-1522)
The Assumption of the Virgin

Oil and gold on wood
Metropolitan Museum of Art

The angels form a mandorla as they lift the Virgin. The crowning (by angels, rather than by Christ) and the arrival in Heaven are simultaneous. The twelve apostles are shown without attributes, but the two in the foreground seem to be John (left, with just the beginning of a moustache and goatee, not a beard like the others) and Peter (bald spot and short, square beard).

Angels singing in Heaven from a shared songbook were a common device in the previous century. See this page for more examples.

Read more about images of the Assumption.
Read more about images of angels with song books.

Photographed at the Metropolitan by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.