joerg - For some reason, my message is not getting through as intended.
My 2 (1st gen) secs @ 6 Daytonas have never been treated & have been running, trouble-free since they were purchased 4.5+ years ago. The point here is that the 1st gen secs @ 6 A7750 movement seems to be hearty & fairly reliable. If you want a secs @ 6 Daytona, see my 'Perfect Daytona' posting.
In the case of later/current versions of the secs @ 6 A7750 movements used in modern 1165xx Daytonas, when powdered (not liquid) graphite is applied to a properly serviced/running movement as described in my original posting, it should eliminate the friction problems inherent to the additional gearing required to relocate the running seconds. Powdered graphite is not a panacea for all of the potential problems that may exist within a used mechanical movement. In other words, treating an unserviced movement or 1 that may have other mechanical problems may result in less than satisfactory results. Not to say that if you have a dead movement, the powdered graphite treatment should not be attempted. I am only saying that there are many things that can cause a secs @ 6 A7750 to fail & these should always be considered.