Seikosha-SLV

The Seikosha-SLV was made by Seikōsha, the manufacturing branch of Hattori Tokei-ten. It was a quiet 5-blade leaf shutter with speeds from 1 sec. to 1/500 sec. plus B . Maybe a version without slow speeds existed. Maybe this version was used for the Minolta ER (unsecure source).

Camera list

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

• Aires Viscount
• Komaflex-S by Kowa
• Mamiya Prismat PH
• Minolta ALS
• Minoltina-S and Minoltina AL-S
• Nikkorex 35|2
• Olympus Eye Flex A
• Polaroid 120
• Primo Jr by Tōkyō Kōgaku
• Ricoh 500
• Ricohmatic 225

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)

Links

• Tower 19 repair notes, with a list of cameras using the Seikosha-SLV (link dead)