cover 1kr. black vertical pair and 6kr. ultramarine horizontal pair on 1868 (June) envelope from Heidelberg to Pennsyvania, U.S.A., cancelled by small double ring d.s., showing "FRANCO" in blue, "NEW YORK PAID ALL" c.d.s. in red and "MECHANICSBURG PA" c.d.s. all on front, somewhat worn and a little toned nevertheless a very scarce franking. M.17a, 19a. Photo