Steineck ABC Wristwatch Camera. Circa 1949, 8 exposures on circular film in special magazine. Manufactured by Steineck Camerawork Tutzing, Germany | Kameras
Miniatur-Spionagekamera-Uhr. Deutschland um 1948 Entwo… | Drouot.com
Steineck ABC Kamera (watch camera) - Catawiki
Steineck ABC Wristwatch spy camera (1949) - Catawiki
Steineck ABC Wristwatch Camera | International Spy Museum