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Discussion Starter #1 (Edited)
We have always been told that a new mechanical movement needs time to settle in. Microscopic imperfections should wear off and the oil be spread evenly. Being open-minded we decided to take a look at it, says Gabriel Arlanch, the founder of the Swedish watch brand Arlanch.

Adressing the issue of wear Arlanch and Primateria, a specialist in surface engineering, examined one new escape wheel and one that had run for 30 days. The test was conducted with an electron microscope, which uses electrons instead of light. The escape wheel was chosen as it is one of the fastest turning wheels in a movement second only to the balance wheel.

The result? The two wheels looked identical. Clearly showing that the running in period only is a matter of the oil being spread evenly and does not polish the parts. Please find pictures of the new and old escape wheels attached.

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