I doubt I’ll get this lucky again!

[thor447]

I’m working on my next budget rebuild.   I bought a 70’s Gruen “parts” watch on eBay for $20.  I figured it would make a good project if it wasn’t too far gone. The watch itself has character.
 

I got the rear side of the movement assembled this evening. These timegrapher readings are after the initial regulation and running for about three hours. It’ll obviously change before everything is said and done, and it hasn’t been tested in multiple positions yet, but I just found these results pretty stunning.  I guess the extra time I took to make sure that the pallet fork stones were spotlessly clean and the escapement lubrication was done properly paid off!  I doubt I’ll see trace lines like this very often. 

[GuyMontag]

Nice! What bugs me is when I service a watch, wear it for a couple of days and then regulate it to something like yours, then put it away and when I next take it out a month or two later, it's now at +30 seconds/day. How does that happen?!

[Nucejoe]

2 hours ago, GuyMontag said:

Nice! What bugs me is when I service a watch, wear it for a couple of days and then regulate it to something like yours, then put it away and when I next take it out a month or two later, it's now at +30 seconds/day. How does that happen?!

 One would think, lubricants get fully distributed in first few weeks so get more voulnerable to air exposure.