Week 20 starts off with a change in format for the graph and a change in conditions for the watch.
I will not wear my Precisionist 98B153 for the rest of the 52 week testing period - it will stay in its watch box at Ambient Temperature. This is to test the accuracy at lower temperatures than those experienced while wearing.
Since I am still interested in continuing the accuracy study begin 20 weeks ago, I will keep that data intact. I also did not reset the watch at the beginning of the "off wrist" portion of the test. As a result, the beginning of this new phase of testing is not starting at 0.0 seconds, but rather at -0.08 seconds - the last reading before I took the watch off. This zero offset should not matter much as we go forward, but for you sticklers out there (you know who you are ), please keep this offset in mind.
There are also two new spec lines on the graph, these start at Week 19 and progress forward at +10s/y. These are added so one can easily compare the ongoing accuracy results including wearing of the watch started Week 0, and the accuracy of just the "off wrist" portion of the test started at Week 19.
Hope you find the results interesting as we go forward.
So, without further ado, I present to you the Bulova Precisionist 98B153 Accuracy Tracking Graph for Week 20: