I was looking at an Omega Cosmic that had a cal. 613 movement, so I looked up what I could find about it. This series was concurrent with the 286, it seems, but I don't know how it compares to the earlier manual movements that are so highly regarded. The 613 has the Reed's regulator and 2 adjustments, it's a little smaller and seems to have different gear ratios. I couldn't find any real assessments of the movement on-line. I'd think it might not be exactly to the standards for the 30T2 series, is that correct?
David