Zaria 2009B

 
Zaria 2009B |

Zaria 2009B

Description

One of the most familiar russian movements is the caliber Zaria 2009B, a windup movement with a diameter of 20mm or 8 3/4 lignes.

It is the technically heavily modernizes successor of the Zaria 2009, but doesn’t share any similarities.

Zaria 2009B: older version

older version

The little less known, older version still has got a fixed hairspring stud and an inhouse shock protection, which reminds a bit of a Ruby-Neutro-Shock.

Zaria 2009B: base plate

base plate

The first oddity of this, only 2.9mm flat movements is the lack of a center minute wheel. Instead, there’s a reverser wheel between the mainspring barrel and the second wheel, beared under an own bridge.

Of course, the Zaria 2009B is well equipped with bearing jewels, in total 21, including ellipse and lever pallets.

Zaria 2009B: base plate with minute wheel

base plate with minute wheel

The second wheel (or decentral minute wheel) engages into the reverser wheel with the help of a slipping clutch:

Zaria 2009B: second wheel with slipping clutch

second wheel with slipping clutch

The second wheel is followed by a double third wheel, which indirectly drives the center seconds pinion. The double execution eliminates play and ensures a smooth center seconds indication.

Zaria 2009B: double third wheel

double third wheel

Another oddity is, that the center seconds pinion is ruby-beared not only on the movement side, but also on the dial side. This is realized by an integrated jewel into the hollow shaft, onto which the cannon pinion is set later.

Zaria 2009B: dial-side bearing for the center seconds pinion and egagement of the second wheel into the reverser wheel

dial-side bearing for the center seconds pinion and egagement of the second wheel into the reverser wheel

Additionally, the use of the reverser wheel requires, that the mainspring barrel rotates against the normal direction, which requires an additional reverser wheel in the windup gear train.

Zaria 2009B: gear train

gear train

The remaining two gears of the gear train are beared under an own cock. They are the seconds wheel and the escape wheel.

Zaria 2009B: side view of the gear train

side view of the gear train

With only 18000 A/h, the Zaria 2009B is a slow-beater. As balance for the swiss pallet lever escapement, a three-leg anular Glucydur balance is used, beared in a generic russian three-leg shock protection. Older versions use another, unknown shock protection type.

The adjustment happens on the hairspring key.

Zaria 2009B: balance spacer

balance spacer

To fix the different height requirements for different shock protections, a typical crude mechanism is used, consisting of a flat piece of metal, which is put between the balance cock and the main plate, the so-called spacer.

Zaria 2009B: balance spacer, older type

balance spacer, older type

On the older versions, the spacer is fixed and consists of brass.

Zaria 2009B: dial side, older version

dial side, older version

On the dial side of the new version, you can already see the preparation of a date indication, a recessing near 8 o’clock for the calendar wheel.

Zaria 2009B: Zaria 2009B: Dial side

Zaria 2009B: Dial side

Of course, the Zaria 2009B uses a yoke winding system.

The hands setting wheel of the winding mechanism first engages with a reverser wheel, then onto the gear of the second wheel, and finally on the reverser and reduction wheel for the hands.

Technical data

Manufacturer:Zaria
Caliber:2009B
Size:8 3/4''' (measured: 20,0mm)
Height:2,90mm
A/h:18000
Number of jewels:21
Escapement:Pallet lever
Balance types: Glucydur anular balance (three legs)
Shock protection(s): 3 arms, russian
?
Balance bearing / direction hairspring:Clockwise
Moveable stud:no/yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel
  • third wheel, center second pinion, large driving wheel
  • transmission wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:3 hole(s)
Attachment of setting lever:plugged
Features:
  • SCI (indirect center seconds)
References: Flume: (K3 13)
Mentioning in literature (years): 1983
Inventory number:23056

Usage gallery

Zaria 2009B: Zaria ladies' watch

Zaria ladies' watch

Zaria 2009B: Zaria ladies' watch  (case missing)

Zaria ladies' watch (case missing)

This movement with the Zaria ladies watch, and as movement with dial but missing case is a kind donatrion from Jake R.Kaywell to the movement archive. Thank you very much for your great support!

Caliber Family
Zaria 2009B