Oberschlesien. 1929.
Charcoal drawing.
Signed in lower right. Lower left titled and dated. On light gray Ingres laid paper (with watermark). 31.3 x 40.8 cm (12.3 x 16 in).
[CB].

We are grateful to Roswita and Viktor Pontzen, archive Albert Birkle, Salzburg, for their kind expert advice. The work will be included into the forthcoming catalog raisonné with the number 670.

PROVENANCE: Private collection Southern Germany.