8926 See through Case Back question

[kreizler]

I gave my husband an Invicta 8926 (purchased online). Thank you all--this forum was a great resource in making the selection. We're both thrilled with it and he's received many compliments already.

One question: the half-disk visible though the back is "loose." It freely swings around as the watch is handled revealing the gears inside as it rotates. Is this part supposed to be stationery?

(Incidentally: watch arrived in yellow logo box, coin edge bezel, wing logo on second hand, $129 total.)

[OompaLupah]

The half-disk as you call it is the rotor. The rotor spins to wind up the mainspring... if it didn't spin, the watch would not work.

Congrats on a nice choice for him.

[Dxomas]

Congrats on a Great watch.

That thing is the rotor, what winds the watch as you wear it.

Enjoy your new Invicta!

DX

[Dxomas]

Jim you beat my reply by ten seconds.... :-)

I'll just have to be faster on the draw... lol

[kreizler]

thanks so much guys!!!

[Pat McCarthy]

Ms. K -

I see you were ably advised by some of our regulars. Please let us know if you have any more questions.

Be sure to let your husband know about our Forum here, and that we "come with the watch". You are both always welcome here to visit.

Congrats on the great gift selection!

[JCX]

Newbie questions here... does it matter in what direction the rotor spins? i noticed that the rotor of my new RI 8926 has an arrow, and although the rotor does spin in both directions, it appears to spin in the opposite direction of the arrow more often than in the direction of the arrow. looking at rotor spin as i hold watch up side down horizontally and also move it from side to side horizontally. BTW, my 8926 was 10 seconds behind US time yesterday and today it is 7 seconds ahead of US time. 17 seconds difference in one day seems like a lot to me. if this keeps happening it'll be several minutes ahead within a few days. am i overreacting here? thnx.

[JBHII]

JCX said:

Newbie questions here... does it matter in what direction the rotor spins? i noticed that the rotor of my new RI 8926 has an arrow, and although the rotor does spin in both directions, it appears to spin in the opposite direction of the arrow more often than in the direction of the arrow. looking at rotor spin as i hold watch up side down horizontally and also move it from side to side horizontally. BTW, my 8926 was 10 seconds behind US time yesterday and today it is 7 seconds ahead of US time. 17 seconds difference in one day seems like a lot to me. if this keeps happening it'll be several minutes ahead within a few days. am i overreacting here? thnx.

The rotor on the Miyota 8215 is unidirectional. While the rotor freely spins in both directions, it will slightly favor the "path of least resistance" which is opposite the arrow.

I'd monitor the watch over a few days and see what kind of accuracy you get - watching it over a weeks time will give you a clearer picture.

[JCX]

so when you say you've regulated your 9937 to + 2 seconds do you mean 2 additional seconds each day? after seven days your watch will be 14 seconds ahead of U.S. time, and 1 minute ahead of U.S. time in 30 days. am i getting this right?
my 8926 was + 17 the first day, + 20 the second. is this a reason for me to claim a manufacture defect and send it to invicta? otherwise i'll have to adjust it every 3 days or so. then theres the cost of shipping both ways. should i try to regulate myself? then i'd need to buy those tools and risk screwing it up entirely.
this watch is my daily wear if that matters. i'd just hate to spend $40 on tools or another $20 or so on shipping when the watch itself was only $100.
i was never this picky with watches, but after hearing everyone here talk about accuracy and all that i'm beginning to be. am i just expecting too much out of this watch?

[Pat McCarthy]

JCX said:

. . .
am i just expecting too much out of this watch?

JC

Accuracy is really just a matter of personal preference. If it was your most important consideration, you would have purchased one with a quartz movement. They are relatively inexpensive, cheap to maintain (battery cost), and can be obtained in just about any style.

But - you've purchased an automatic, or self-winding watch, and now you have to understand the intracacies of its machinery. And, make no bones about it - your automatic watch is a finely honed and tuned machine.

Some folks will spend thousands to get a very accurate automatic, however, it isn't necessary to spend a lot to get one that will serve your needs. Personally, I check the accuracy of my watch every day against the NIST web site. I don't know why, but I get a great deal of comfort knowing my watch is performing consistently within its envelope. Should the accuracy change, I wil know either something is wrong with it or that it needs service.

Bottom line here is that you have a $100 auto with a Miyota movement. Unless it is really off - say half a minute a day, I wouldn't worry about it. Just reset the time on a regular basis. I would not attempt to regulate it myself. Many have tried to regulate the Miyota movements with very little success. In fact, one watch personage we all know well tried to regulate his with disasterous results. If you need it regulated, take it to a watchmaker. They can do the job for a relatively small fee.

[Pete]

so when you say you've regulated your 9937 to + 2 seconds do you mean 2 additional seconds each day?

Yup. +2 in 24 hours. I find this is within the capabilities of the 99xx watches. Interesing thing is I have a 9937 and 9939. and if I wind them both up and run them side by side, they run neck and neck with each other within a couple of seconds right up until the stop running. Both run just a fuzz fast until the mainspring is almost unwound, then they both slow down.

All of the other automatics I have, like Seiko, Citizen, Orient, and a couple of Russians, are more along the lines of the 89xx. I have managed to get them down to maybe 4 sec a day, but they never stay there for long.

My advise is not to worry about it and just enjoy the watch. I just set my watch behind 15 seconds or so and let the watch catch up as the day progresses.

If you really want a more accurate watch but want to stay with mechanical, the 99xx watches are a very good buy for $300-$400.


Happy New Year everyone!

-Pete

Not a watch expert by any stretch of the imagination. More of a tinker'er I supose. I have been in the mechanical and electrical trades for around the last 20 years. I guess that makes me a professional tinker'er

[JCX]

thanks both of you. until know i didnt know quartz were more accurate. i guess i just figured big name watches use auto movement so it must be more accurate - oh well. i did have a $60 fossil that was super accurate for eight years with only 2 battery changes at $10 each - not bad.

the mechanical aspect and the sweeping second hand appealed to me, but i would say that accuracy is slightly higher on my list of wants for a TIMEKEEPING DEVICE.

my watch is consistently +20 seconds per day. except for this flaw, i love the watch. having to adjust every 3 days or so was not something i was anticipating. i also worry about the crown threads every time i unscrew to adjust. the crown pops out after i unscrew. over time i'm sure the last thread or two will mess up with the popping out action of the crown. i guess i could push it in until completely unscrewed.

Pat, you mentioned 30 seconds off per day, well, 20 seems off enough to me. i'll check to see if a pro watch person can regulate it for a small fee (it seems simple to unscrew caseback and turn the little regulating screw especially for a watch pro).

and again, i guess it was my fault for assuming auto was more accurate than quartz. will still enjoy watch regardless. thnx all for the input.