View Full Version : What is this version of this heliar 21cm lens?

14-Feb-2017, 17:20
Hello everyone。 Most cases, the heliar 21cm lens are barrel lens or mounted in the compur \ compound shutter.The The lens in the photo, mounted in copal NO. 3 shutter was rarely see, is this an original version?

Dan Fromm
14-Feb-2017, 17:29
What's the serial number?