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GlenM
·I have a 1970 Speedmaster, which has recently had a full service.
During the past week, I have been keeping track of its timekeeping accuracy using the iPhone Watch Tracker app.
I'm very impressed. A 45 year old watch is managing to average a loss of less than 2 seconds per day.
The watch was left dial up every night, wound in the morning, and work all day.
![IMG_0026[1].PNG](https://omegaforums.net/data/attachments/205/205224-aad4f6114c31f9a81f1ff0e9ec160c64.jpg?hash=qtT2EUwx-a "IMG_0026[1].PNG")
During the past week, I have been keeping track of its timekeeping accuracy using the iPhone Watch Tracker app.
I'm very impressed. A 45 year old watch is managing to average a loss of less than 2 seconds per day.
The watch was left dial up every night, wound in the morning, and work all day.
