What is the value of Carl Zeiss Jena Binoculars DF6×30 859832?

Cheap Alli style="float:left;margin: 0 20px 10px 0;" src="http://farm5.static.flickr.com/4145/4954228418_21130faca1_m.jpg" width="" />I am trying to hold on to these binoculars until they are worth some money, and so far I think they may be only worth $10.00
They come in a leather case from the U.S. Naval Gun Factory / Optical Annex Shop in Rochester , NY. They are extremely old binoculars.

 

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Tagged with: 859832 • Binoculars • Carl • DF6x30 • Jena • value • Zeiss