Thank you for the feedback nic. Will ask my guy in New york to give this a try as this is beyond my comfort level. Is this actually dirt that accumulates under the crystal or some sort of coating that is coming off?
Should a "Heuer Guy" be the only one to play with this? Wish you were closer. Know anyone in the US on the east coast? Many thanks
Jamey

: I have seen this before too. My advise is to cleean the underneeth
: of the glass but you should remove it first as the markers
: easily fall off if nudged. Glass removal of silverstones is
: normally pretty easy as the gasket tends go quite solid with
: age. Remove the movement/dail etc
: then gently knock the glass from the underside (i use a tiny
: plactic hammer)or you can try pushing. The glass will go back in
: fairly easily as long as the gasket remained intact.
: nic