The Mechanical Eye Door Viewer 👁️
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YouTubeInvention
The Mechanical Eye Door Viewer 👁️
Original Video Credit: IG/kim.jacobi Unlike modern peepholes that only look straight ahead, these older adjustable viewers used a movable internal lens assembly that could swivel inside the brass housing. By shifting the center mechanism, the homeowner could scan different areas outside the door without opening it. From the outside, the lens ...
9.7M views1 month ago
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