Most visitors online was 1660 , on 12 Dec 2020
Thank you about your complete answer , i was wondering because last year was servicedSorry to answer a question with a question but it really depends what you mean by clean? Might be an idea to begin by asking what you want to do with the clock? Do you want to run it or is it effectively a static object? if you want to run hot all the time or even occasionally, it might be useful to mentally split the clock into working and non working surfaces. A bit like a car there are bearing surfaces and working surfaces and if you like the chassis. The chassis of your clock is the clock frame (plates and pillars) and all the other non-working surfaces. sounds a bit extreme but all these working surfaces in place. If a clock is to work 'safely', it is the bearings that need to be 'clean'. This can only be achieved by disassembly and washing out those bearings. Once the clock is re-assembled with new lubrication, the oil slowly gets contaminated with air-borne dust including inorganic material such as mica. You will read quite a lot that this forms a kind of grinding paste. Yes, is the answer, in my view the clock needs disassembly and washing in something like white spirits or paraffin or a proprietary equivalent. Particular attention to bearing holes and bearing surfaces. Just a note but your clock is fingerprinted. To prevent further fingerprinting, consider wearing disposable nitrile gloves when handling metal surfaces. If the clock is going to be static i.e. not working. The tarnish on brass components under regular domestic environments i.e. relatively warm and dry, forms a passivated layer, so although over the years, the tarnishing will gradually get darker, unlike rust on iron/steel, it will not consume the components. It also looks like (difficult to tell from photos) some of the pivot holes are worn. If the clock is being serviced, your watch/clockmaker will be able to check depthing and if necessary, bush some bearings to optimise centre-distance between mobiles. Hope this helps and good luck!