A few weeks back I was fortunate enough to find a very inexpensive, but minty, Zeiss Ikon 6x6 folder. The fastest ASA setting is 200. However, since there is no metering in the camera I'm assuming the ASA dial has no mechanical relationship to shutter and aperture settings and I should just shoot based on film speed and handheld meter readings.
The model I have is the 523/16, Opton Tessar 3.5 lens.
Yes, I know - this should be a no brainer. All my other folders have never had a ASA setting.....