Parrenin 2641D

 
Parrenin 2641D

Parrenin 2641D

Description

The Parrenin 2641D is a simple pin lever Roskopf movement with 12 lignes diameter, originating from the 1980s. It is a french construction, but already produced from the Hong Kong Remex Led., which once was one of the lagest customers of Parrenin and took over the factory, when Parrenin got into trouble in the 1970s.

The gear train bridge and the balance cock have got a simple stripe decoration, which ist unusual for the price and quality class. As a contrast, the crown wheel is only riveted with the barrel bridge and one can only hope, that it never breaks, because it is also part of the simple made ratchet.

gear train

gear train

As you can see, the 2641D is a simple Roskopf movement in a pillar construction, which at least has got a directly driven center second.

The gear train itself is not typical for a Roskopf movement. Like a standard lever movement, it consists of the second wheel, third wheel, seconds wheel and escape wheel.

The keyless works is housed in a plastic cage. Fortunately, it is pretty thick and so will last longer as you normally know from plastic parts which become brittly pretty fast.

side view of the gear train

side view of the gear train

Except the “alibi” cap jewel of the movement side balance wheel bearings, there are no rubies at all.

It’s noteable, that the lever- and balance wheel cocks use the same pillars and lay above each other, but can be screwed independently.

The three leg anular balance is beared in two Novodiac shock protections, but their bearings consist of metal and only the visible cap jewel on the movement side is a ruby.
With 18000 A/h, the balance still beats slowly and can be adjusted roughly at the very simple made hairspring key.

As escapement, a cost-efficient pin lever escapement is used, which is not really silent.

mainspring barrel

mainspring barrel

Typical for a Roskopf movement, on the lower side of the mainspring barrel, there’s a double wheel with a slipping clutch. This wheel drives the hour and minute cannon pinions simultaneously, so there’s no need for an exchange wheel.

Interestingly, this double wheel is also a plastic part and fortunately not yet brittled.

empty dial side

empty dial side

On the empty dial side, you can see, where the cannon pinion will engage with the large mainspring barrel wheel. The settings wheel also engages with the barrel wheel.

You can also spot the yoke winding system, which is a simple but efficient construction.

dial side with cannon pinion

dial side with cannon pinion

Like on any Roskopf type movement, the cannon pinion is driven by the mainspring barrel.

An odd detail is the shock protected cap plate of the balance wheel, which you can see at 5:30. Here, metal rubs on metal; this is neither a long-loving solution nor does it ensure good precision results.

calender machanism

calender machanism

The Parrenin 2641D has got a simple calender mechanism on which the finger of the date switching wheel is just stamped out and bended. Nevertheless, this mechanism already offers a semi-fast correction by turning the hands back to 8pm and advancing to midnight.

(Please forget the spring on top, you can see its real place on the next photo)

covered calendar mechanism

covered calendar mechanism

The first cover of the calendar mechanism offers the recess for the spring, which holds the date ring with its red(!) numbers in position.

Parrenin 2641D: Dial side

Parrenin 2641D: Dial side

A second cover now protects the spring against flying away.

On the remaining sticker oarts, you see that at least on the specimen shown here, the dial was not only plugged, put also glued, no idea, why they have done this.

A final word about the price classification of the movement: In the 1980s, in German mail order catalogs, watches with this movement were offered for the same or even lower prices as watches with the foreign exchange subsidized UMF 24.

In the lab

The movement came gummed into the lab and got a simple service treatment.

Timegrapher result

In absolute figures, the timegrapher results are not really great, but for a pin lever movement, they are pretty OK.
The maximum positional deviation of 40 seconds is quite low and only four times of the allowed value of the COSC certification.
Only the amplitude differences between horizontal and vertical positions are high, but for a movement, where only ohne balance wheel pivot is ruby-beared understandable and still OK.

horizontal positions
dial up +30 s/d 254° 0.2ms
dial down +40 s/d 260° 0.1ms
vertical positions
crown right (12 up) +5 s/d 204° 0.4ms
crown up (3 up) +20 s/d 204° 0.2ms
crown left (6 up) +-0 s/d 199° 0.5ms
crown down (9 up) +-0 s/d 218° 0.2ms

Technical data

Manufacturer:Parrenin
Caliber:2641D
Caliber base:Parrenin 64
Size:12''' (measured: 26,7mm)
A/h:18000
Number of jewels:1
Escapement:Pin lever
Balance types: Nickel anular balance (three legs)
Shock protection(s): Novodiac
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, large driving wheel
  • mainspring barrel
Construction type:pillar construction
Winding mechanism:yoke winding system
Setting lever spring:1 hole(s)
Features:
  • SCD (direct center seconds)
  • QG (date indication (aperture))
Production period:1977 - 1990
Inventory number:21002

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