All that is consistent with what I've observed. Except I never saw one of the newer Copal 3 shutters, i.e. those with "chunky" speed rings and linear aperture scales, that had more than seven aperture blades and created a more round aperture than modern, all-black Copal 3 shutters with seven blades. If you get a chance, please post a picture of your 240mm Symmar-S shutter stopped down to around f/11, so we can see how round it is. Thanks in advance.
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