||Karl Falkenstein (1865-)
||Mainz: B. Schott's Söhne, n.d. Plates Edition Schott 03967, 03968.
||Scanned at 600dpi grayscale, improved, converted to monochrome,|
cleaned with 2-point algorithm, additional manual cleaning.
Colour covers scanned at 300dpi.
Publication by Schott noted in Hofmeister's Monatsbericht (1869), p.108.