Manufactured for Sears by Kamerawerke Wilhelm Witt, this rangefinder was a great value (even compared to the Argus C-4) when it was introduced in 1958.
The 51 has a two-piece wind lever on the top left, counter intuitive film loading and moderately helpful instructions on the bottom. Also sold as the Iloca Rapid B.
Manual from Butkus.org
|Speed||B, 1 – 1/300|
|Lens||Steinheil Munchen Cassar|
|Focus||3ft to ∞|
|Aperture||f2.8 – f22|