Übersichts-Karte der Eisenbahnen und der bedeutenderen Post- und Dampfschiff-Verbindungen in Deutschland : und den angrenzenden Ländern

Unidentified prime meridian.
Includes list of units of measurement per one degree at the Equator.
Available also through the Library of Congress Web site as a raster image.
LC copy sectioned into 8 and mounted on cloth, folding to 20 x 12 cm. Signed on verso in upper right: Millard Fillmore 1856. Mounting effaces map on verso, which seems to be a map of middle Europe.