Agree, because of remarkable advice of Shaffhausen
While visiting the IWC factory more than a year ago I got the advice: the simpler watches once in five years, the complicated ones only when problems arise. I didn't see the logic in it, and decided to expand the advice on the more complicated watches to the simpler ones. Until now none of my watches were serviced, all run quite well.
Kind regards,
Paul, wearing rose gold VC Portuguese
PS: At a farewell party of a colleague I saw someone with a rose gold Portuguese Automatic. It really looked magnificent and big on a strange wrist a few feet away: only when inspecting it a bit more closely it regained its familiar appearance to me.