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Jedi · 14 July 2008, 08:03 PM

I have observed over the past several months that certain activities will effect the precision of my 16570 Explorer II Blanc.

After the breaking in period, it was at an awesome +1.5/day.

Once, I thumped the table rather aggressively and was rewarded by an immediate jump in rate to about +7/day, well above COSC levels. The watch then settled back into about +3/day.

Before I left on a fishing trip last week, I set the watch and 7 days later it's running about +4.8/day. I've been casting lines, fighting fish and just mucking about in the bush and on the lake and boats etc.

Let's see if it settles back down to a lower rate of deviation.

Yes, I'm a little weird, but it's fun.

2careless · 14 July 2008, 08:07 PM

Is your Exp2 3185 or 3186?
My GMT2 3186 has been consistently -1.5s per day. The only time it goes faster is when I don't wear it and let the reserve goes near empty.

Jedi · 14 July 2008, 08:10 PM

Z-series with 3185.

The 3186's and Milgauss movements and 4130s are performing really really well. But I'm also certain it's down to adjustment and regulation as well. For instance, my Sub came back from RSC running +3/day and is now at +8/day meaning it has to go back for a check. Before that, after 10 years it was running at +2/day.

Jedi · 14 July 2008, 08:14 PM

But when the power reserve goes low, the torque in the spring is lower therefore does not exert enough force into the escapement which regulates the timing, thus speeding up the watch.

Andad · 14 July 2008, 09:29 PM

Do you have something to support this?

A link or a reference would be good.

BigHat · 14 July 2008, 10:26 PM

Quote:

Originally Posted by directioneng

Do you have something to support this?

A link or a reference would be good.

Lee's point is pretty well known. I think I have a story on the Panerai that confirms his point. I'll post tonight if need be.

Jedi · 15 July 2008, 12:10 PM

Eddie,

Try taking a look at TZ's archived articles on watchmaking. This little snippet on main spring behaviour was explained to me by a watchmaker and by FP Journe himself. I cannot even hope to quote them verbatim.

Lubrifar · 15 July 2008, 12:29 PM

I took my ex-Exp II and did everything with it as far as outdoor activities are concerned. It was a Z serial with 3186 (wiggle) and never experienced COSC issues. A real solid performer! Best of luck!

f16570 · 15 July 2008, 07:03 PM

My Exp II is on my wrist all the time at the moment, even back to sleeping with it on.
It is currently +1 second a day, 3185 movement. Great.

14 July 2008, 08:03 PM	#1
Jedi "TRF" Member Join Date: Sep 2007 Real Name: Lee Location: Malaysia Watch: 16750 Posts: 2,534	Precision variations... I have observed over the past several months that certain activities will effect the precision of my 16570 Explorer II Blanc. After the breaking in period, it was at an awesome +1.5/day. Once, I thumped the table rather aggressively and was rewarded by an immediate jump in rate to about +7/day, well above COSC levels. The watch then settled back into about +3/day. Before I left on a fishing trip last week, I set the watch and 7 days later it's running about +4.8/day. I've been casting lines, fighting fish and just mucking about in the bush and on the lake and boats etc. Let's see if it settles back down to a lower rate of deviation. Yes, I'm a little weird, but it's fun. __________________ Lee This is my watch. There are many like it but this one is mine... Flickr Blog

14 July 2008, 08:10 PM	#3
Jedi "TRF" Member Join Date: Sep 2007 Real Name: Lee Location: Malaysia Watch: 16750 Posts: 2,534	Z-series with 3185. The 3186's and Milgauss movements and 4130s are performing really really well. But I'm also certain it's down to adjustment and regulation as well. For instance, my Sub came back from RSC running +3/day and is now at +8/day meaning it has to go back for a check. Before that, after 10 years it was running at +2/day. __________________ Lee This is my watch. There are many like it but this one is mine... Flickr Blog

14 July 2008, 08:14 PM	#4
Jedi "TRF" Member Join Date: Sep 2007 Real Name: Lee Location: Malaysia Watch: 16750 Posts: 2,534	But when the power reserve goes low, the torque in the spring is lower therefore does not exert enough force into the escapement which regulates the timing, thus speeding up the watch. __________________ Lee This is my watch. There are many like it but this one is mine... Flickr Blog

14 July 2008, 09:29 PM	#5
Andad 2024 ROLEX DATEJUST41 Pledge Member Join Date: Nov 2006 Real Name: Eddie Location: Australia Watch: A few. Posts: 36,861	Do you have something to support this? A link or a reference would be good. __________________ E

15 July 2008, 12:10 PM	#7
Jedi "TRF" Member Join Date: Sep 2007 Real Name: Lee Location: Malaysia Watch: 16750 Posts: 2,534	Eddie, Try taking a look at TZ's archived articles on watchmaking. This little snippet on main spring behaviour was explained to me by a watchmaker and by FP Journe himself. I cannot even hope to quote them verbatim. __________________ Lee This is my watch. There are many like it but this one is mine... Flickr Blog

14 July 2008, 08:07 PM	#2
2careless "TRF" Member Join Date: Dec 2007 Location: Melbourne, AU Watch: Pepsi Posts: 4,370	Is your Exp2 3185 or 3186? My GMT2 3186 has been consistently -1.5s per day. The only time it goes faster is when I don't wear it and let the reserve goes near empty.

15 July 2008, 12:29 PM	#8
Lubrifar Banned Join Date: Jun 2007 Real Name: Mr. T Location: anc/sfo Watch: for the signs! Posts: 776	I took my ex-Exp II and did everything with it as far as outdoor activities are concerned. It was a Z serial with 3186 (wiggle) and never experienced COSC issues. A real solid performer! Best of luck!

15 July 2008, 07:03 PM	#9
f16570 "TRF" Member Join Date: Jan 2007 Real Name: F Location: Scotland Watch: Exp II White Face Posts: 4,272	My Exp II is on my wrist all the time at the moment, even back to sleeping with it on. It is currently +1 second a day, 3185 movement. Great. __________________ Why have what's new when you have what's best. f

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