: thanks for your comment.

: The weird coincidence is this morning I just
: sent off a montreal to the watchmaker for
: exactly the problem you mention ...
: "dirty" inside crystal . I didn't
: realise it came from the movement oil.

: shaun
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Hi Shaun;
I should say it is just out gassing from everything in the case.

Sometimes even the lum. is still a little damp and is put back in.
Its just that the hole thing, dial, movement and cleaners oils etc. Do out gas.

Take Care
Peter