Most visitors online was 1660 , on 12 Dec 2020
Unlike the 'cleanup runs' where 4c , S, and 2B plates were used, we'll probably never know the true story on these...
these are simply frankenwatches with 992 bridges and cocks on a 1B plate.
As they seem to all be high serial number examples, that could lean one to believe 'another' cleanup run
will be hard to prove though.
there ARE however 999B examples with 992B (straight line milliskeen) damaskeen in these late runs, but the markings are for Ball...