I recently was able to receive training on the Omega 861(more on that later) and the Maurice Lacroix Masterpiece Calendrier Retrograde. I acquired this watch recently from the original owner, it is from 2002, and has never been serviced. The amplitude was around 290 degrees full wind, however on inspection the jewels were mostly dry. Fortunately the previous owner said they didn’t wear it very often, so my hope was nothing was torn up from running dry. It has the somewhat typical it seems hands miss alignment, about 4 minutes. The base movement is a highly embellished 6498 More to follow.