Second version of Mamiya's popular 35mm rangefinders, released in 1955. Early versions had f3.5 lenses, and later had f2.8. Recognizable from the first model by its slightly round finder windows.

• Lens: Setagaya Kôki 4.5cm f3.5 or Mamiya-Sekor 45mm f2.8
• Shutter: Seikosha-MX, 1s - 1/500th, plus B
• Unclicked aperture.
• Minimum focus distance: 1m
• ISO Range: Reminder only, 25 - 200.
• Finder: Coupled rangefinder with life-size, reverse-contrast field. Green field with circular yellow focusing patch.