This file is most likely NOT in the public domain. It has been marked for review, and will be deleted in due course if the review does not find it to be in the public domain.
This file was previously considered to be in the public domain as a German stamp; it is possible that it is in the public domain for other reasons, in which case a new rationale will be applied as part of the review process. See below for the previous rationale.
Previous public domain rationale, no longer applicable
{{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|Difficult stamps with microscopes of the en:Optical Museum Jena<br/> <div style="clear:both"></div> {| align="CENTER" style="width:80%; background-color:#f7f8ff; border:2px solid #88
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