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Discussion Starter · #1 ·
I have one Lepsi Scope Timegrapher that runs with software for Android or iPhone devices and will tell you the Timing (seconds fast or slow), Amplitude and Beat Error for Mechanical/Automatic watches.

Awesome tool to keep track of your own collection to evaluate the condition of potential purchases (it's small so you can take it with you).

Manufacture's site for more details:

I have one new in box for sale, $275 includes Priority shipping to any of the 50 US states with Signature Required and to buyers with history and references on WF only.
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