US3247763A
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Binocular having externally accessible filter guide
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US3250176A
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Focusing mechanism for a binocular telescope
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US3266367A
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Binocular focusing mechanism having indexing detent
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GB884389A
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Improvements in lens arrangement for a binocular telescope
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GB880826A
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Improvements in automatic lens casings focusing means for a binocular telescope
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GB884213A
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Improvements in automatic lens covers for a binocular telescope
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GB900555A
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Improvements in binocular telescope focusing means
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GB849763A
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Improvements in binocular telescope
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