Precisionist 96B153 Accuracy Tracking

[gaijin]

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:



HTH

[v76]

Week 15, and it's off by +0.1s. Same wear pattern as before.

[gaijin]

Week 15, and it's off by +0.1s. Same wear pattern as before.

Thanks for the update!

[Goose]

Wonder what the change(s) were for the newer versions of the guts. My 1st gen is not even close to this test subject.
Does anyone know?

[gaijin]

Wonder what the change(s) were for the newer versions of the guts. My 1st gen is not even close to this test subject.
Does anyone know?

Unfortunately, no. We are not even sure there were any changes. Just too little data to say for sure.

HTH

[gaijin]

After one full week of not wearing the Precisionist, and storing it at room temperature (approx. 70*F), it gained 0.57 seconds - putting outside the +10s/y limit line. If this trend continues, then obviously this watch needs to be worn in order to conform to the +10s/y spec from Bulova.



HTH

[Goose]

Thanks again, Gaijin.
I've synced my BP to the atomic clock. Don't recall the last time I did that. Posting here will serve as a record for me when I check it moving forward.

[gaijin]

Thanks again, Gaijin.
I've synced my BP to the atomic clock. Don't recall the last time I did that. Posting here will serve as a record for me when I check it moving forward.

You're welcome. Glad you found the info useful.

Do you plan on wearing yours "moving forward?"

[Goose]

No. It just sits next to the bathtub (see pic a few posts earlier).

My least worn watch. Have thought of selling it. But, someday, I can say I have a first run vintage Precisionist, sitting next to the bathtub.

[v76]

Week 16, and it's off by +0.2s. Still wearing it not more than about 8 hours per week (no change in wear pattern).