I hope I didn't appear to be contradicting what you said. Having looked at the two images again, I don't see the differences you are referring to. But anyway, let's call you correct, and me wrong!
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_28
The Omega 28 (according to the Ranfft archive) has an indirect sweep seconds feature.
Click to expand...