We would suggest the following 3 resources:

1. 1. Look on this page on our website to see if you can find an answer to your question(s): just click on -> http://www.1-800-4clocks.com/page/CLOCKS/ClockFAQ
2. 2. You can locate a Howard Miller Authorized Service Center local to you here -> http://cql.howardmiller.com/HM/ServiceCenterLocator.aspx. NOTE that all mechanical Howard Miller clocks had Hermle movements in them until about 5 years ago, and that most any if not all of these Service Centers should be able to work on any Hermle Clock.  This Service Center Network is a great resource, and we have had an excellent experiences working with Service Centers around the Country (and also Canada) using this Service Center Network.  Probably at least half of these Service Centers can work on antique clocks too, as well as other Brands of Clocks!!!!
3. 3. You can order Hermle (and other) Parts (e.g. movements, weights, pendulum, keys, etc.) from the following 2 suppliers -> www.BlackForestImports.com and www.Merritts.com.  While we have no relationship to them whatsoever, we personally have had good results working with them ourselves.  Their contact information is available on each of the noted  websites.  We would most definitely recommend calling them rather than attempting to order from their websites (which would likely be a fruitless effort).