I just bought what appears to be the eighth celesta ever made. It is a Mustel celesta from the late 1800s, of course. I just put it up for sale on ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=380093424605&ssPageName=STRK:MESE:IT&ih=025

I was wondering if anyone knows anything about this particular celesta's history or can point me to an extensive (moreso than wikipedia) history of Mustel celestas. I'm not asking how much its worth, I just want to know more about it.