Zeiss Opton Sonnar 50mm 1.5

[notko]

Images from a local auction site

#1


#2


According to Carl Zeiss Jena lenses Issue date by serial number -> http://forum.mflenses.com/carl-zeiss-jena-lenses-issue-date-by-serial-number-t6865.html the serial Nr visible in #1 places this lens sometime between 1926 and 1927. Then #2 shows a red T. Are there really that early Zeisses with red T? BTW, didn't they give the FL in cm at that time?

[Mir]

Carl Zeiss Oberkochen

Part of the serial number sequence of lenses made by Zeiss after World War II at Oberkochen/ West Germany [1]

Serial nº Year
10,000-500,000 1946-1951
500,000-1,100,000 1951-1953
1,100,000-2,600,000 1953-1959
2,600,000-3,000,000 1959-1961
3,000,000-4,000,000 1961-1965
4,000,000-5,000,000 1965-1969
5,000,000-6,000,000 1969-1971
6,000,000-7.300,000 1971-1975

excerpt from :
http://camera-wiki.org/wiki/Carl_Zeiss_serial_numbers

[kds315*]

Smakula of Zeiss developed coating in 1936 and it was a secret of war, so coated lenses showed up a few years later only to the public