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Message: <blockquote data-quote="thor447" data-source="post: 4171249" data-attributes="member: 24867">Yeah, pretty low amplitude.  Beat error looks great.  I'd like to see how that thing runs in multiple positions, but depending on what movement is in it, I'd like to see that amplitude higher.  It might not be the mainspring.  Just a bit of gunk in the jewels or too much/little end shake or side shake can cause massive issues with amplitude.It'll probably run fine as it is (for a while), as long as it is somewhat stable in dial up / dial down / crown down (which will have more of an amplitude drop in crown down).  If it were my watch, I'd be opening it up though.Do you know what movement is in it?  For a regular type Swiss movement, I'd really like to see 240 degrees of amplitude or higher - depending on it's condition.</blockquote>