The Arogno 151 is a relatively rate 10 1⁄2 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.
It has got the classical gear train with directly driven center minute wheel.
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.
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
Timegrapher resultFor a 60year old movement, which did not get a professional service, the rates on the timegrapher are OK.
|dial up||+22 s/d||203°||6.4ms|
|dial down||+23 s/d||213°||5.9ms|
|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|
|Number of jewels:||15|
Nickel screw balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
|Functions:||hour, minute, decentral second|
|Size:||10 1/2''' (measured: 23,2mm)|
Flume: 1949 I 43|