Raketa 2628.H

 
Raketa 2628.H

Raketa 2628.H

Description

The caliber 2628.H of the russian Petrodworez watch factory is a handwind movement, which features a day-date indication.

The suffix .H indicates, that there was one update on the construction.

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With its shock protected four leg ring balance and the shock protected escapement wheel, this movement is suitable for rough situations.

detail: balance cock mounting

detail: balance cock mounting

Russian movements ofter contain non-standard solutions agains problems with the fitting precision of some parts. A balance cock, which gives the balance wheel too few space in height is often found on russian movements, not only at Raketa. The “solution” is a flat metal plate, which is inserted between the main plate and the balance cock. Simple but efficient.

gears and trains

gears and trains

The movement construction is standard: The minute wheel is located in the center under an own bridge and thus allowes the usage of a directly driven center second wheel.

For the escapement, a swiss-type pallet lever is used.

slanted view

slanted view

On the side view, you can see the concentric wheels for minute and second.

Grundplatine

Grundplatine

On the Raketa 2628.H, all gears, including the minute wheel are ruby-beared. Only the mainspring barrel is beared in metal bushings, but technically, that’s irrelevant.

At “11:30”, “03:30” and “07:30”, three additional jewels can be spotted. They are used on the dial side for bearing the date ring.

dial view without date indication mechanism

dial view without date indication mechanism

The shape of the setting lever spring with its large round plate at the bottom is typical for Raketa movements.

At “2:00”, there’s a yoke for the date setting mechanism. It probably advances the date by pulling the crown, but since on the specimen shown here, the winding stem is missing, it could not be verified.

dial side view with open date mechanism

dial side view with open date mechanism

The date mechanism is quite extensively made. The setting wheel at “11” is responsible for the instant switch of date and day.

dial side view with missing weekday disc

dial side view with missing weekday disc

The star wheel at 12 o’clock advances the weekday disc one turn.

Raketa 2628.H dial side

Raketa 2628.H dial side

Although the weekday disk has got 14 positions, the weekday is shown only on one language (here: english).

Technical data

Manufacturer:Raketa
Caliber:2628.H
Number of jewels:19
Escapement:Pallet lever
Balance types: monometallic anular balance
Shock protection(s): Poljot
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
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:4 hole(s)
Features:SCD,JG,QG
Functions:hour, minute, second, day, week day
A/h:18000
Size:11 1/2''' (measured: 25,6mm)

Usage gallery

Raketa gents watch  (dial only)

Raketa gents watch (dial only)

Links

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