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Repairing a World War II Navy Chronometer - The Iconic Hamilton Model 21 скачать в хорошем качестве

Repairing a World War II Navy Chronometer - The Iconic Hamilton Model 21 3 months ago

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Repairing a World War II Navy Chronometer - The Iconic Hamilton Model 21
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Repairing a World War II Navy Chronometer - The Iconic Hamilton Model 21

This is the most expensive broken watch (or clock?) I've purchased on eBay. It was sold to me at a "discounted" price of about $1,600 due to issues that I'll uncover and repair in this video. It's hard to call this a "deal" at that price, but in the end it was worth it. World War II created a dire chronometer shortage for the United States. Before the war, most chronometers for American military and civilian customers were imported from Europe so we had that unfortunate supply chain dependency on that part of the world. In 1939, anticipating war, the U.S. Naval Observatory sought American watch manufacturers to mass-produce chronometers. Hamilton and Elgin participated, but only Hamilton met the Navy’s accuracy standards. Early 1942, Hamilton’s prototypes were selected after passing with a +/-1.55-second daily error rate. During the war, Hamilton produced approx 8,900 chronometers for the Navy, 1,500 for merchant ships, and 500 for the Army. In contrast to other movements of the time, Hamilton incorporated the detent escapement and the helical, corrosion resistant elinvar balance spring to maximize the accuracy it could produce. These chronometers were specialized timekeepers for determining longitude at sea. A chronometer set to a known time standard like Greenwich mean time, allows sailors to determine their longitude by comparing it to local time. Since one hour of time difference equals 15 degrees of longitude, the time gap between the chronometer and local time reveals the ship’s longitude. #restoration #watchrepair #clock #chronometer #military Contact info: [email protected] Many of my tools I use are affordable. If you're interested in getting started with watch repair and would like to use what I use, I've included some links below. I earn a small commission from Amazon if purchases are made using these links. Useful Texts: I am pleased to be part of Chronoglide's affiliate program. If you are not familiar with the company, Chronoglide is a professional watchmaker in the Netherlands. They have an excellent YouTube channel by the same name. I'm excited to share their team has written a book called "Watchmaking Explained" - Everything you need to know as a watchmaker, but no one is telling you. A practical guide for all watchmakers and enthusiasts! Their book is designed to be interactive, loaded with QR codes linking to additional videos and content. https://www.chronoglide.nl/boek/aff/3/ Other texts: Watch Repairer's Manual: https://amzn.to/3knrwdG Watchmaker's Lathe: https://amzn.to/3D02WGb Tools: Micrometer: https://amzn.to/3vPPuUy Micrometer Stand: https://amzn.to/3vPPuUy Microscope: https://amzn.to/3ZrQ3Pn Movement Holder (pocket watches): https://amzn.to/3H9JBUv Movement Holder (wrist watches): https://amzn.to/3JeG2iv Ceramic Tipped Tweezers: https://amzn.to/3QP1qMH Finger cots: https://amzn.to/3CXbXzJ Micrometer: https://amzn.to/3QNGN3C and Stand: https://amzn.to/3iIyF86 Rodico: https://amzn.to/3kr5RBb Tweezers: https://amzn.to/3GNFEVi 10X Loupe: https://amzn.to/3iLfome Levers: https://amzn.to/3XB4RZG Demagnetizer: https://amzn.to/3ZINUhS Budget Screwdrivers: https://amzn.to/3Xr7gqo Better Screwdrivers: https://amzn.to/3SZRGkY Cleaning: Mesh Baskets: https://amzn.to/3ITqikE Ultrasonic: https://amzn.to/3wcO7wg Mason Jars: https://amzn.to/3WkUfgB Cleaning Solution: https://amzn.to/3XwQ16I Rinsing Solution: https://amzn.to/3wdgAlA Cleaning Brushes: https://amzn.to/3QPnSp8 Lubrication: Oilers: https://amzn.to/3Xi8LXR DX Grease: https://amzn.to/3ZO0kVU Moebius 941: https://amzn.to/3Hf6g2X Moebius 9010: https://amzn.to/3CVGM7Y Moebius D5: https://amzn.to/3ITqikE Buffing and Polishing: PolyWatch: https://amzn.to/3XlVTja Polishing Compound: https://amzn.to/3QQ1r33 Bench Buffer Polisher: https://amzn.to/3OlcW2E Chapters: 0:00 Introduction 1:40 Begin Disassembly 20:29 Cleaning 23:54 Fusee Cone Repair 26:34 Begin Reassembly 29:31 Making a Tool 33:08 Continue Reassembly 42:40 Escape Wheel Repair 43:30 Continue Reassembly 45:23 Detent Escapement Demo 46:48 It's Alive! 47:22 Brass Bowl Restoration 49:45 Gimbal Repair and Final Steps

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