NKS
NKS was the name of a leaf shutter mounted on some Japanese cameras of the 1950s. K.Fukushi says in this page that it was made by Nippon Kōsokki Kōgyō K.K. (日本光測機工業株式会社), that made the Taron cameras.
The usual NKS shutter had B-1-200 speeds. According to a post by someone who dismantled one, it was a copy of the Prontor II. There was a variant called NKS-FB with B-1-300 speeds, and another variant called NKS-SC.
On some wartime cameras there is a T-B-1-200 shutter marked NKS-TOKIO, it is probably an early variant, and Tokio is probably an alternative writing for Tokyo.
Here is an incomplete list of cameras equipped with a NKS shutter (it was not necessarily the only type of shutter available on these models):
- Amiflex
- Atom Six
- Beautyflex
- Daido Six
- Elmoflex
- Gnoflex
- Malcaflex
- Mihama Six
- Monade Flex
- Pigeonflex
- Roico later variant (marked NKS-TOKIO)
- Sunflex
- Toyocaflex
