Arogno 151

 
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Arogno 151

Description

The Arogno 151 is a relatively rate 10 12 ligne manual wind movement of fair quality from Switzerland.

Besides the indication of hours and minutes, it also has got a decentral seconds hand at 6 o’clock.

gear train

gear train

It has got the classical gear train with directly driven center minute wheel.

side view of the gear train

side view of the gear train

The two leg screw balance is not shock protected and beats contemporarily slow with 1800 A/h. It regulates a classical swiss pallet lever movement.

Arogno 151 dial side

Arogno 151 dial side

The setting lever spring, which is broken on the specimen shown here, has got a typical shape. You also see very well the yoke winding system of this movement.

In the lab

The specimen shown here was only slightly gummed and hence only got a fast cleaning and a simple service.

Timegrapher result

For a 60year old movement, which did not get a professional service, the rates on the timegrapher are OK.

horizontal positions
dial up +22 s/d 203° 6.4ms
dial down +23 s/d 213° 5.9ms
vertical positions
crown right (12 up) -115 s/d 174° 7.7ms
crown up (3 up) +15 s/d 170° 7.8ms
crown left (6 up) +115 s/d 174° 7.2ms
crown down (9 up) -138 s/d 179° 6.8ms

Technical data

Manufacturer:Arogno
Caliber:151
Number of jewels:15
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:s
Functions:hour, minute, decentral second
A/h:18000
Size:10 1/2''' (measured: 23,2mm)
Literature: Flume: 1949 I 43
Inventory number:16021

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