Do you wear your watch on your hammer hand? Either way, an automatic watch has a mainspring which is designed to slip back after full wind-up. That is why you can manually wind an automatic for ever, it never gets to the end of the mainspring. As to "overwinding" a manual wind will come to the end, and especially older versions say 1960 or earlier, which had blued-steel mainsprings, are more prone to breakage when slightly pushed further when at end. Or at least they will be force of the connection at either end, termed "un-hooked". As to your watch running a few hours fast, only one thing can cause this phenomenon. The hairspring or balance spring is in charge of fast or slow. It is a flat coiled or spiraled spring. Above and below it are the balance jewels which hold a small bit of oil. A very hard knock "can" dislodge oil out onto the spring, which while coiling and uncoiling can make to (or more) coils stick together hence shortening the "working" length. Shorter spring-quicker opening and closing. The coils on your watch happened to free themselves after running a while. Keep up the good "Exploring" :)
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- 591 posts total
- 591 posts total