Ulysse Nardin GMT Perpetual内科实物展

我在等你 · 发表于河南南阳 2011-11-5 15:42:02

我在等你 · 发表于河南南阳 2011-11-5 15:42:43

This watch uses the Lemania chronographCaliber 1352 as its base movement. I think that the main reason forthis choice and not Ulysse Nardin’s usual one, the ETA Cal. 2892, isprobably due to the large diameter of the module fitted to it. TheLemania Cal. 1352 is actually a refinement of their older Cal.1340/1341. The main differences being a thinner and more simplifiedautomatic winding section and some additional refinements to the dialside to bring the overall thickness down from 8.2mm to 6.5mm. Casingdiameter remains unchanged at 31mm. For those unfamiliar with the Cal.1340/1341, Omega used this movement for a short time in theirSpeedmaster line in the 1970’s as Cal. 1045.
Here is the going train and barrel, together with the two wheels that accomplish both hand and auto winding.

我在等你 · 发表于河南南阳 2011-11-5 15:43:18

With the upper bridge in place, one can see the cut-outs for the chrono parts, which are not used in this model.

我在等你 · 发表于河南南阳 2011-11-5 15:43:45

The dial side ready for the module to be fitted on to it. Thewheel left of center is the driving wheel for the perpetual module.This wheel is driven by the hour wheel which has the 12 notchesinternally in order that the hour hand can be advanced or retarded inone hour increments. The steel disc with the 12 notches on top of thehour wheel, together with the pushers and their extensions,accomplishes this.

我在等你 · 发表于河南南阳 2011-11-5 15:44:19

Here one can see the underneath of the module. The wheel in thecenter is for the 24 hour hand with the pusher extensions and theirspring just below it. The interconnected wheels on the left hand sideare the quickset wheels for programming the module.

我在等你 · 发表于河南南阳 2011-11-5 15:44:49

The cover not only holds the pusher extensions in place, but also provide the lower supporting jewel for the barrel arbor.

我在等你 · 发表于河南南阳 2011-11-5 15:45:15

The lower plate of the module fitted to the movement. From thispicture one can see that the module is not really watchmaker friendlyfor servicing. Why? Due to the fact that the screw close to the topjewel and slightly right of center can only be accessed by dismantlingmost of the module. Most perpetual modules can be fitted and removed asa complete unit. This one and the Patek Philippe do not permit that dueto their construction.
Watches that permit the module to be removed as a complete unit,without disassembly, are easier for the watchmaker to service. There isno difference as far as the user is concerned.

我在等你 · 发表于河南南阳 2011-11-5 15:45:48

The complete movement, sans the automatic winding. Note that the automatic winding is not a module like the ETA Cal. 2892.

我在等你 · 发表于河南南阳 2011-11-5 15:46:19

The steel wheel on the right has the month indicator attached toit. Here one can see it together with its driving wheels. The smallbrass wheel with one tooth adjacent to it makes one revolution permonth. Each revolution of this wheel advances the month wheel by onemonth. The steel month wheel also has one large tooth – that’s December– to advance the year by one digit for each revolution that it makes,as it changes from December to January.

我在等你 · 发表于河南南阳 2011-11-5 15:46:51

Here with that sections top plate in place. The two steelpinions near the top at the 12 O’clock position are for the date (lowerone) and decade (top one).

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