Amida 425

Amida 425 | - The Movement Archive

Amida 425


Amida is one of the manufacturies, which were rather seldom found and which had no clear vision on their movements.

The caliber Amida 425, which is part of the caliber series Amida 420, is a 11 1/2 ligne pin lever movement of fair quality. It is a relative of the pallet lever caliber series Amida 710.

Amida 425: base plate

base plate

Although it is only a pillar construction, it is quite well made. So, for example, all important bearings contain rubies and there’s even a shock protection used, to be seen on its golden toned frame.

Amida 425: gear train

gear train

The gear train of the Amida 425 is of Roskopf type, with a dial-side driven display works. Unlike native Roskopf movements, neither a slipping clutch on the mainspring barrel is used, nor is the gear train reduced by one wheel.

The gear train is the following: Mainspring barrel - second wheel - third wheel - seconds wheel - escape wheel, where the seconds wheel indirectly drives the center seconds wheel.

As escapement, a pin pallet escapement is used, which is well and flat executed.

Amida 425: side view of the gear train

side view of the gear train

In contrast to “real” Roskopf movement, the two leg anular balance beats with the standard rate of 18000 A/h. This rate can be adjusted on the hairspring key only.

For preventing damage by shocks, a pair of KIF Trior shock protection bearings is used for the balance wheel.

Amida 425: Amida 425: Dial side

Amida 425: Dial side

An oddity is the indirectly time display works: It happens by a double change wheel, internally connected by a slipping clutch, where the lower wheel engages with the mainspring barrel and the upper wheel simultaneously drives cannon pinion and hour wheel.

Besides this oddity, it shall be noted, that the Amida 425 uses a “true” and well executed yoke winding system, just like it is used on any “better” pallet lever movement.

In the lab

The movement came without case, broken and heavily rusted into the lab, was de-rerusted and brought back to life with spare parts. Afterwards, a simple revision was made.

Timegrapher result

Of course, it performed poor on the timegrapher, but taking into account, that this movement was beyond any hope before and literally brought back to life, the rates are acceptable. If the amplitudes are correct cannot be said, since the lift angle of this caliber is unknown.

horizontal positions
dial up +74 s/d 267° 0,3ms
dial down +-0 s/d 300° 0,4ms
vertical positions
crown right (12 up) +44 s/d 247° 0,1ms
crown up (3 up) +85 s/d 238° 0,1ms
crown left (6 up) +68 s/d 236° 1,0ms
crown down (9 up) +60 s/d 236° 0,9ms

Technical data

Caliber base:Amida 420
Size:11 1/2''' (measured: 25,7mm)
Escapement:Pin lever
Balance types: monometallic anular balance (two legs)
Shock protection(s): KIF Trior
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
  • lever
  • escape wheel, seconds wheel, center second pinion, third wheel, large driving wheel, mainspring barrel
Construction type:pillar construction
Winding mechanism:yoke winding system
Attachment of setting lever:screwed
Setting lever spring:4 hole(s)
  • SCI (indirect center seconds)
References: Flume: K3 -
Inventory number:23008

Usage gallery

Amida 425: Preziosa gents watch  (case missing)

Preziosa gents watch (case missing)

This movement is a kind donation from R.Ludwig to the movement archive. Thank you very much for your great support!

Other movements from Amida