Pierre-Michel Colas is recorded working in Vienna between 1763 and 1781. He is known to have produced snuff boxes in conjunction with the enamel painter Philipp Ernst Schindler II: a signed example in the Gilbert Collection is ornamented with plaques of classical figures en grisaille on a veined blue marble ground (Charles Truman, The Gilbert Collection of Gold Boxes, vol. I, Los Angeles, 1991, no. 136). Two boxes by Colas in the Thurn und Taxis Collection, Regensburg, are decorated respectively in the manner of Pierre François Drais with grisaille miniatures and with a diamond-adorned portrait of Empress Maria Teresia (Lorenz Seelig, Thurn und Taxis Museum, Munich 1998, nos. 78 & 79).