Thread: Celestron C11 - Colours, Years and Serial#'s
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Old 04-07-2020, 05:58 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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My grey C11 purchased in 2009 has no serial number.
The design of the rear cell and standard coatings changed along the way.
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