Recently, I purchased a Rodenstock 240mm lens in a copal 3 which is marked Sironar 240mm 1:5.6 and I am not certain if it is the "N", "S" or some other series of lens. SN727922X. I reviewed the threads, but could not answer my questions. Can anyone advise? Any idea when it was made and its coverage? It appears to be MC, but has one coating "flakes/flaws" on the front cell and long series of "coating flaws" on along the edge of the rear cell. I am hopeful they will not adversely affect photographs with the smaller aperture. I have not been able to use it yet due to the fact the shutter needs to be CLA'd. Any insight or help is appreciated. Thank you.
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