I believe it is the Assumption of the Virgin represented here, Mary ascending to Heaven, flanked by angels. And what a beatific Mary she is! With a wonderful halo of white star-like flowers arching above her, and fantastic billowing blue drapery, wrapping her like a swirl of sea. With tomb below draped in white cloth and dotted with roses, and a couple of palm trees rising from the green landscape below, mountains in the distance. A beauty. 

13 7/8" x 9 7/8" and in good antique condition, 19th century I believe. Some uneveness to the shape of the tin and some light rusting and paint loss around the edges, all to the good I think.