Produced in 1955 Riken Optical Co., Ltd. Japan. Film type 120 Picture size: 6cm x 6cm Weight 27.4oz (776.8g) Lens (taking) Ricoh Anastigmat 80mm f3.5 (stops to f16) Filter Size 36mm push-on Focal range 3.6′ to infinity Shutter Riken Shutter speeds B, 1/10 – 1/200 Viewfinder TLR Exposure meter none, Accessory shoe. Taken from Here
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