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Greetings! Excited to join the Forums. I have been a watch enthusiast for years but just started learning watch repairing recently. So I guess here is the right place for me to ask newbie’s questions. I have an affordable timegrapher, Weishi 1900. I check my own watches periodically using this machine, and also use it for watch repair exercises of course. I have seen wavy lines, full screen of scattered dots and a couple of other patterns on my timegrapher, but I never understood this pattern(picture attached below). You probably already noticed, one of the two lines is jumping up and down. The “dropped dots” almost formed a third line. I am so confused what does this pattern indicate? A bit additional info, this watch is one of those that I put on timegrapher from time to time. And I haven’t seen this kind of reading on this watch before. Also, the reading was totally fine when the watch was on dial up position when I checked a few minutes ago(picture attached below). I have realized that the weird jump line only appears when the watch is on vertical positions(crown right and crown down mostly). Any idea will be appreciated! Hopefully this question isn’t stupid:-)

Hello everyone,digging through my hidy holes I found a nos Seiko 6602 7040 in box with label from July 1971 and through it on the timegrapher and I couldn't believe the results, so I will share with you. This watch has never been opened and as you can see it doesn't run to bad in 4 positions. I have a few more nos Seiko 's somewhere I shall turn the joint upside down now out of curiosity. Thanks everyone