TSK
TSK is a name on some Japanese leaf shutters of the 1950s.
As the Elbow flex was fitted with a TSK shutter and was made by Tōyō Seiki Kōgaku, it seems likely that TSK stands for Tōyō Seiki Kōgaku and that the shutters were made by that company; however, nothing is yet clearly known.
Cameras fitted with TSK shutters
Listing of a camera here should not be taken to mean that all examples of the camera were fitted with TSK shutters.
