![Elgin 539 with replaced balance cock and balance complete from Elgin 554 - Regulation, Watch Performance and Timing Machine (Timegrapher) Readings/Results - Watch Repair Talk Elgin 539 with replaced balance cock and balance complete from Elgin 554 - Regulation, Watch Performance and Timing Machine (Timegrapher) Readings/Results - Watch Repair Talk](https://www.watchrepairtalk.com/uploads/monthly_2022_09/436587575_2022-09-2611_23_21-Window.png.d3985d96fd439b917fc7a5f89c5c6ae3.png)
Elgin 539 with replaced balance cock and balance complete from Elgin 554 - Regulation, Watch Performance and Timing Machine (Timegrapher) Readings/Results - Watch Repair Talk
![Elgin A-11 extended wheel removal - Service, Repair & Adjustment Techniques (Not Timing or Regulation) - Watch Repair Talk Elgin A-11 extended wheel removal - Service, Repair & Adjustment Techniques (Not Timing or Regulation) - Watch Repair Talk](https://www.watchrepairtalk.com/uploads/monthly_2023_09/114elgina11v2.jpg.d8d283b781f180bba901186d1d3affe6.jpg)
Elgin A-11 extended wheel removal - Service, Repair & Adjustment Techniques (Not Timing or Regulation) - Watch Repair Talk
![The simple but effective hacking mechanism of the original WWII Elgin A-11 US military watch (Elgin 539). This allowed troops to sync up their watches more precisely and proved to be incredibly The simple but effective hacking mechanism of the original WWII Elgin A-11 US military watch (Elgin 539). This allowed troops to sync up their watches more precisely and proved to be incredibly](https://external-preview.redd.it/g7Znd8kbfCHKMrXu6AJlzKXKcl0Qqc0G6w5UK5rHVBc.png?format=pjpg&auto=webp&s=3cb5fae4c87c56d90872662c5a26c508a3042bc8)