Your lightbox loupe will be fine.
the date of both the lens and Compur shutters can be found here. As companies made lenses in batches and bought in shutters in batches as well the two dates don't always coincide. Zeiss Jena changed from cm to mm markings after WWII my 150mm 1950's CZJ Tessar is marked 150
My first lens was/is a 180mm f/5.6 Scheider-Kreuznach Symmar and I absolutely love it. Lots of movement and coming from 50mm as my go-to-35mm lens, 180 is perfect.
Oooohh, actually mine is not a Symmar-S, but the older convertible style. I think you will be very pleased though with the "S".
I really dig the convertible aspect; two for the price of one!
nice lens barry !
its a convertible i think, so you have 2 lenses in one :)
it probably converts to a 315mm f12 when converted
( remove the front lens from the shutter )
i have a old 210 / 370 and it is nice when converted
nice wide open for portraits.
I thought that the Symmar-S series are not convertibles actually.
However, this would suggest otherwise....http://www.apug.org/forums/viewpost.php?p=178013