Seikosha-SLV

The Seikosha-SLV was made by Seikōsha, the manufacturing branch of Hattori Tokei-ten. It has a quiet 5-blade leaf shutter with B, 1–500 speeds. A version without slow speeds existed. There is also a Seikosha-SLS with 1/1000 sec. that has been improved to achieve a faster shutter speed.

Cameras with SLV shutter

Variants and cameras equipped (incomplete list, and not all variants are concerned):

• Aires Viscount
• Beseler Topcon Auto 100
• Horseman 985 Camera
• Komaflex-S by Kowa
• Kowa Model E
• Mamiya Prismat PH
• Minolta ALS
• Minoltina-S and Minoltina AL-S
• Nikkorex 35|2
• Olympus Eye 44 (f/3.5 version)
• Polaroid 120
• Primo Jr by Tōkyō Kōgaku
• Ricoh 500
• Ricohmatic 225

Cameras with SLV shutter w/o slow speeds

• Minolta ER

Cameras with SLS shutter

• Aires Radar Eye

Bibliography

• Kamera no mekanizumu sono I: "Hai! Chīzu" Shunkan o torae-tsuzukeru shattā-ten (カメラのメカニズム・そのⅠ・「ハイ！チーズ」瞬間をとらえ続けるシャッター展, Camera mechanism, part 1 "Cheese!" Exhibition of instant taking shutters). Tokyo: JCII Camera Museum, 2002. (Exhibition catalogue, no ISBN number)