A Crash Course In Flieger (Pilot) And B-Uhren (Navigator) Watches Covering Both Historic And Modern Examples (A Pilot's Watch Photofest!) - Quill & Pad
Teutonia - watches with unmistakable character | Mühle-Glashütte
Sold at Auction: German Marine Chronometer, W(ilhelm) G(ustav) Ehrlich, Bremerhaven