Black metal body (no silver ring). Yellow 'EE' markings. Metal focus grip. The last of three versions, all three shared the same optical design. The specific lens used in this test was manufactured in June of 1972 (code: 2T), around the time that the product codes began being printed on the back of the lenses.
1970 - 1973
Hexanon - C
f/1.4 - f/16
IR Performance Notes
Since collecting more of Konica's prime lenses I've seen THE highest IR scores since starting these tests. I have yet to test this one in the wild, as soon as I do I'll post some results below...