Venus 175

[nicolasg]

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Στις αντιγραφες ειναι πρωτοι οι κοντοι...

[george_]

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[stelakos]

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[george_]

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αυτη ειναι η ιδια μηχανη,με την κινεζικη

[george_]

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Στις αντιγραφες ειναι πρωτοι οι κοντοι...

που το ειδες?

[mic]

Οι Κινέζοι βασίστηκαν πάνω στον Venus 175 για να φτιάξουν τον δικό τους χρονογράφο,ο οποίος εξελικτικά σήμερα είναι ο Seagull ST-19. Αυτό δε σημαίνει βέβαια ότι είναι ίδιοι οι δύο μηχανισμοί και εξαρτήματα του ενός μηχανισμού μπορεί να ταιριάζουν στον άλλο,ούτε ότι η ποιότητα είναι ίδια... Κάτι ανάλογο είχε γίνει και με τους Ρώσους,που πήραν την valjoux 7734 και έφτιαξαν την poljot 3133.

[george_]

πιο αναλυτικα

[george_]

 It's basically the Venus 175, and the story goes that Sea-Gull bought the tooling off the Swiss

αυτο ξερω

[george_]

First the basic data of the ST19 movement:

Made by Tianjin Seagull Watch (Group) Ltd. Co. - in Chinese: 天津海鸥手表（集团）有限公司
(The worlds largest manufatcurer of mechanical watch movements)
Link to the movement division:
http://www.tjseagull.com/default.asp
(Chinese only, with a few English subtitles)

Movement production in:
Tianjin, Tianjin Municipality, P.R. China
Shenzhen, Guangdong Province, P.R. China

Column wheel chronograph movement

Data for the ST1901 variant:
2 register, small seconds at 9, 30 min counter at 3
Handwound
Diameter 31.3 mm

21600bph

Factory acceptance values:
Daily rate +30 to -10 sec/day
Power reserve 38 +/-2 hours

Actual observed values in "real life watches":
Accuracy +15 to +5 sec/day (fits into the statistical expected range) with some samples keeping exceptionally good time at +2 to +5
Power reserve 36 to 50(!) hours. The reason for this is that the mainspring basically can deliver a power reseve of 50+ hours, but to reach this a perfectly assembled and lubricated movement is necessary. In Chinese serial production this can not be guaranteed.

Seagull does not bother with offering "higher grade" movements receiving special treatment during assembly. Would they do so, these might certainly run at C.O.S.C. chronometer standards with the power reserve in the above mentioned range.

Short history:
The ST1901 movement is nearly identical to the Venus 175 - parts are interchangeable. But the movement is not a copy or clone. It actually is the Venus 175, because Seagull has purchased the tooling from Venus in the early 1960ies. Seagull did copy the tooling to be able to produce at 2 locations. Differences or improvements to the Venus 175 are the increased beat (the Venus only had 18000 bph) and an added incabloc style shock absorber.

[Petros1]

Ωραίες πληροφορίες...

[george_]

αν θυμαμαι καλα,ο ιδιος ανθρωπος εχει σχεδιασει και την cal 48 της Minerva

[DragonAce]

Αλλα και σε πιο διασημα ρολογια





Venus 175

υπέροχο!

[Βost]

Αλλα και σε πιο διασημα ρολογια





Venus 175

υπέροχο!

+1000

[george_]

[george_]

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