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  1. C

    I bought a Swift Audubon 804 and need more information!

    The only difference that I can find between this binocular and the second of the near-identical ones described in the seminal study by de Vries and Huff (I have had the PDF on my PC for years now) is that the right-hand prism cover reads Model No.804 in the present binocular and those in the...
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