Another 3135 Accuracy Thread

[Ed Rooney]

I've been tracking my Dub Date's accuracy over the past week. So far I'm impressed, but it does one oddball thing. Once it is set, the first day it's just under +2s. After that it alternates, +2s, +4s, +2s and so on.

Basically what I am seeing over an extended period averages out to +3s/day.

[fwellers]

Since about day one for the past 2 years, it's been at almost exactly +21 secs a week. It's nothing if not consistent.

[Jedi]

My SubDate behaves like yours Ed.

I'm thinking of regulating it though, as it is potentially capable of so much more

[Perdu]

Mine's +3 a day on the winder. I have not checked it out when wearing it but I will some day. It's probably not unusual to have daily variations.

[SPACE-DWELLER]

Key word of the accuracy of a mechanical timepiece is consistancy. If your Sub Date gains 2, then 4, then 2 seconds consistantly, your Sub Date runs perfectly, IMHO.

[Ed Rooney]

Originally Posted by SPACE-DWELLER

You cannot expect dead on consistancy of the timekeeping of a mechanical watch. Deviations will occur. Your Sub Date runs perfectly, IMHO.

I want it to tick like a Westclox.

[SPACE-DWELLER]

[f16570]

My Exp II is +7 seconds from mid December.

[CanuckRolex]

Originally Posted by Ed Rooney

I've been tracking my Dub Date's accuracy over the past week. So far I'm impressed, but it does one oddball thing. Once it is set, the first day it's just under +2s. After that it alternates, +2s, +4s, +2s and so on.

Basically what I am seeing over an extended period averages out to +3s/day.

This is probably why, the diffeent ways you set it down at night will have it regulating differently.

[atldavek]

My Sub was plus 28 over 7 days or of course plus 4 a day, I don't know the daily variations as I didn't check, about 4 of those days was on a winder.

[Gurmot]

I heard somewhere that they are always set to run fast. Given that there must be some variation, Rolex think it is better if a watch runs fast than if to runs slow. Eg, it's better to arrive early for everything than late. Makes sense.

[fwellers]

Originally Posted by CanuckRolex

This is probably why, the diffeent ways you set it down at night will have it regulating differently.

Sweet. Thanks for posting that. I never knew such a thing existed.
I've heard about, and do use the poor-man regulation technique however. I have to keep mine crown up at night, otherwise I would run too fast. So that thing does work.

[fwellers]

Originally Posted by Gurmot

I heard somewhere that they are always set to run fast. Given that there must be some variation, Rolex think it is better if a watch runs fast than if to runs slow. Eg, it's better to arrive early for everything than late. Makes sense.

I hate it when a watch runs slow. Not only for the reason you mentioned, but it's also more of a pain to adjust it back to atomic time when it runs slow. All mechanical watches must run fast.

[StanGMT]

Originally Posted by SPACE-DWELLER

Key word of the accuracy of a mechanical timepiece is consistancy. If your Sub Date gains 2, then 4, then 2 seconds consistantly, your Sub Date runs perfectly, IMHO.

Bo is absolutely right - consistency is what's important.

I have found over many years that my 1675 GMT is as consistent as they come. The actual timekeeping has varied over the years, usually following services, where everything has been stripped down, cleaned, lubed and then reassembled. Usually following a service it gains or loses a few seconds a day - but consistently so. If I feel that the gain or loss is too much I give it a month for the movement to bed-in, then monitor it accurately, then return it to the workshop to be regulated to compensate for the daily gain/loss - I like it to gain very slightly as this simplifies home regulation. All this usually brings it to within +/- 1 sec per day.

Stan.

[Rackness]

I have been keeping an eye on my SD as of late and it is +2+3 not bad for an 8 yr old unserviced watch.

the 3135 is a tank.