NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2015 May 10, 09:18 -0700
Took an Ebay chance on a Thommen 8 day aircraft clock (7 jewels) that was not working for $45. The clocked arrived not running as described. As soon as the dial glass was removed the second hand started to move. A very very lucky fix :)) The movement was not fully seated and secured by the two screws in the back of the case which caused the second hand to jam against either the dial glass or the minute hand. Adjusting the rate was more difficult. For this a digital stopwatch was used as a master reference. Small adjustments over the course of a day got the clock close to begin a long term rating. The first 24 hours came in with a loss of 8 seconds which is close enough for me on this type of time piece. Hopefully this rate will hold over the coming weeks and increasing temperatures. The Thommen makes for a good companion to a Longines 8 day aircraft clock which I already have. One clock set to UT and the other set to zone time.
Greg Rudzinski
