Air Mail cover 1912 (Oct.) Regensburg Flying Days 20pf. brown, affixed to special 1912 card and cancelled by violet double-ring d.s., regular Bavaria 5pf. applied alongside and tied by Regensburg c.d.s. (11.10). One of the rarities of the pioneer period vignettes. Signed Bloch. M. 8, DM.15,000. Photo