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Mecanisme Vostok

Vostok calibrul 2416B

24 mm caliber sensitive movement with central second hand.
Date calendar of instant action.
Automatic movement with a safety device keeping the spring safe from overwindng.
Height 6,3 mm.
31 ruby jewels.
Shock-resistant balance.
Average daily rate: -10…+20 sec.
Frequency: 19800 semi-oscillation per hour.
Run-tine reserve not less than 31 hrs.
Average term of service: 10 years.
Coating of bridges and plates: nickel or chrome.
Coating of angrenage parts: chemical passivating or gold-cobalt.
Coating of screws: nickel, gold-cobalt, chemical bluing.

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Vostok calibrul 2424

24 mm caliber movement with central second hand.
24-hour scale dial.
Date calendar of instant action.
Height 4,14 mm.
17 ruby jewels.
Shock-resistant balance.
Average daily rate: -10…+20 sec.
Frequency: 19800 semi-oscillation per hour.
Totally wound movement run not less than 36 hrs.
Average term of service: 10 years.
Coating of bridges and plates: nickel or chrome.
Coating of angrenage parts: chemical passivating or gold-cobalt.
Coating of screws: nickel, gold-cobalt, chemical bluing.

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Vostok calibrul 2434

24 mm caliber movement with central second hand.
Second hand locking device.
Date calendar of instant action.
Height 4,14 mm.
17 ruby jewels.
Shock-resistant balance.
Average daily rate: -10…+20 sec.
Frequency: 19800 semi-oscillation per hour.
Totally wound movement run not less than 38 hrs.
Average term of service: 10 years.
Coating of bridges and plates: nickel or chrome.
Coating of angrenage parts: chemical passivating or gold-cobalt.
Coating of screws: nickel, gold-cobalt, chemical bluing.

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Vostok Precision calibrul 2809

Vostok 2809

Mechanical lever movement

Manual winding

Diameter: 28 mm

Movement height: 6,3 mm

Jewels: 22

Functions: hours, minutes, seconds,

Chronometer specs.

Shock protection

Frequency: 18000 vph

Power reserve minimum: 46 h

Vostok Precision este singurul ceas rusesc certificat cronometru (conform COSC), acesta avand unul din cele mai frumoase si apreciate mecanisme de ceasuri rusesti.

Inspirat dupa mecanismul Zenith 135, mecanismul Vostok prezinta cateva imbunatatiri: secundar central, 3 rubine suplimentare.

Zenith 135

Secundar mic la ora 6

13.5''', Dm= 30.0mm

H= 5.0mm

19 jewels

f = 18000 A/h

balance diameter 14mm

1948-1962, ca. 11000

Breguet hairspring

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Zenith_135

Mecanismele 2809 au fost fabricate in Fabrica de Ceasuri Tschistopolsky.

Inscrisurile de pe mecanisme:

- Logo yy3 = logoul fabricii Tschistopolsky (valabil primii ani de fabricatie) sau Logoul B - Boctok

- 22 = 22 rubine sau 18 = 18 rubine - valabil pt Almaz

- serie din 4 cifre sub logo ex: 0159 -> fabricat in trimestrul 1 (primele 3 luni) anul 1959.

-Primele doua cifre se interpreteaza astfel:

-01 = trimestrul 1

-02 = trimestrul 2

-03 = trimestrul 3

-04 = trimestrul 4

Ultimele doua cifre sunt anul fabricatiei.

- serie din 5 cifre= ?

Mecanismul 2809 a fost produs pentru o perioada de timp scurta de aproximativ 5 ani, conform marcajelor de pe mecanisme acesteau au inceput a fi fabricate in anul 1958.

Mecanismele sunt in doua variante de culoare: argintii sau placate cu aur.

Ceasurile rusesti echipate cu mecanisme 2809 sunt: Almaz(2809B), Vostok, Volna si Vostok Precision Class; acesta din urma fiind cel mai rar intalnit.

Exista discutii contradictorii cu privire la care dintre ele sunt cu adevarat certificate cronometru, astfel una din teorii ar fi urmatoarea:

Doar ceasurile Vostok cu cadranul inscriptionat "Precision Class" sau in chirilica " Прецизионные" sunt certificate cronometru, acestea indeplinind cele mai inalte standarde de calitate , iar mecanismele care nu indeplineau precizia necesara erau rebranduite Vostok simplu, Volna, Almaz.

In sustinerea celor de mai sus, cataloagele de ceasuri rusesti din 1960 prezinta pe pozitii diferite Volna si Vostok Precision, ele avand precizii diferite: Volna ~ +30sec/zi, Vostok Precision ~ -10 - +5sec/zi in 4 pozitii.

Ceasurile Almaz au doar 18 rubine, iar reglajul balansierului este clasic fara microregulator.

Ceasurile Almaz au mecanism 2809B.