Hello MWF!
I've searched the archives and I don't seem to find any thread on discussion of getting mechanical clocks.
My dad has a very old grandfather clock which he has diligently wind (uses weights) for the last 39 years - works perfectly and I don't ever recall him getting it serviced! Anyway, I want to get one for my home. May not necessary be a big one but maybe a small wall mounted/shelf/mantelpiece based unit. I have no clue at all about this branch of horology. Any experts out there that can share some thoughts about it?
The reason I got interested was when I saw this particular piece at an AD in Midvalley recently:Jaeger-LeCoultre Atmos Classique Transparente. You don't need to wind it. The change in air pressure between night and day is sufficient to provide it with the necessary energy to run indefinitely - the closest a mechanical instrument could get to be define as a perpetual machine!
Picture taken from the website

Was told by the AD that they can give a big discount on the clock - only problem is the cost of servicing is very expensive as the movement is so unique that only an expert from JLC's HQ will have the tools and knowledge to do it. Nevetheless, I also interested on traditional weight based mechanical clocks. Appreciate any feedback.