Seiko

[george_]

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)
Απίστευτες γωνίες ,κοψίματα,φινίρισμα
πολύ δουλεμένο

δεν μπορώ να πω το ίδιο για το tudor
(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

To ότι έχουν διαφορά στην τιμή , δεν πάει να πει ότι δεν είναι συγκρίσιμα
αφού και ίδια χαρακτηριστικά έχουν και εφάμιλλες προδιαγραφές.
(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

γιατι συνεχιζετε το θεμα?ο καθενας εχει τη γνωμη του!μεγαλυτερη εταιρια ειναι η citizen!

[nicolasg]

γιατι συνεχιζετε το θεμα?ο καθενας εχει τη γνωμη του!μεγαλυτερη εταιρια ειναι η citizen!

γιατί, απαγορεύεται?
μάλωσε κανείς με κανέναν και πρέπει να το λήξουμε?

[Vagelis]

Αυτή η κοντινή του Shogun...

[nicolasg]

Αυτή η κοντινή του Shogun...(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

Eίναι ένα διαφορετικό ρολόι, στα 44 χιλιοστά. 

[Βost]

γιατι συνεχιζετε το θεμα?ο καθενας εχει τη γνωμη του!μεγαλυτερη εταιρια ειναι η citizen!

γιατί, απαγορεύεται?
μάλωσε κανείς με κανέναν και πρέπει να το λήξουμε?

Ιταλικές αλήθειες .... 

Νικόλα έτοιμος όμως είσαι έτσι...αρπάζεις για πλάκα 

[nicolasg]

[Vagelis]

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

Αυτό δεν είναι shogun...

[nicolasg]

(Κάντε κλικ εδώ να εμφανιστεί η φωτογραφία.)

Αυτό δεν είναι shogun...

Για ξεκάρφωμα γιατί ετοιμάζω πενηντάδα.

[Βost]

Darth Tuna

[george_]

A quick (not fully comprehensive) 7S26/6R15/4R** timeline might help:

Mid 1996 – 7S26A introduced

Late 2005 – 6R15A introduced, based on the 7S with Etachron regulator and Spron 510 mainspring

Late 2006 – 7S26B introduced with Etachron regulator

Late 2006 – 6R15B introduced

Mid 2008 -4R15 and 4R16 introduced, based on 6R15 but minus manual winding and hacking

Mid 2011 – 4R36A introduced along with other variants (35, 36, 37, 38 & 39)

Late 2011 – 6R15C introduced – changes:

addition of one jewel on main plate (thus, 23 to 24 jewels)
modified ratchet sliding spring
modified date indicator maintenance plate
new balance wheel
new barrel
Late 2011 – 7S26C introduced – changes to date mechanism, plates, balance cock, changes to pinion heights for better hand clearances

[Βost]

A quick (not fully comprehensive) 7S26/6R15/4R** timeline might help:

Mid 1996 – 7S26A introduced

Late 2005 – 6R15A introduced, based on the 7S with Etachron regulator and Spron 510 mainspring

Late 2006 – 7S26B introduced with Etachron regulator

Late 2006 – 6R15B introduced

Mid 2008 -4R15 and 4R16 introduced, based on 6R15 but minus manual winding and hacking

Mid 2011 – 4R36A introduced along with other variants (35, 36, 37, 38 & 39)

Late 2011 – 6R15C introduced – changes:

addition of one jewel on main plate (thus, 23 to 24 jewels)
modified ratchet sliding spring
modified date indicator maintenance plate
new balance wheel
new barrel
Late 2011 – 7S26C introduced – changes to date mechanism, plates, balance cock, changes to pinion heights for better hand clearances

[george_]

So where does the 4R series fit in to all this?


At first sight, (apart from being slightly more visually attractive with decorated rotor) the 4R15 is a 7S. In essence, however, the 4R15 is a 6R15 with the hacking and handwinding facilities removed – the 50 hour power reserve remains courtesy of the Spron 510 mainspring.  It could be argued that the 4R15 is therefore simply a 7S25 with an upgraded mainspring!  The whole journey from 7S series through 6R to 4R is quite complicated but it would seem that if there were any purpose to all these swings and roundabouts, then such purpose has become apparent relatively recently and would at the time of writing relate to the establishing of a degree of parts commonality between the three series of calibres.  This wasn’t always the case of course but does now seem to be so.

If we look back at the introduction of the 7S26B back in 2006, the base movement had been in production for a decade with no real changes. The major difference was a complete redesign of the regulator which was now of the Etachron type.  In essence, this would allow for finer or ‘better’ adjustment of isochronism (in other words, it would accomplish more stable timekeeping despite a declining mainspring tension).  Indeed, initial reports of the performance of the 7S26B certainly indicated that out of the box timekeeping was somewhat better than the previous series.  This was all rather encouraging as the 7S series had become a firm, if not crude favourite over the years but was certainly not renowned for the best of accuracy without adjustment.  From personal experience the accuracy of the 7S26  in B guise was very much improved; I owned an SNKH63 which ran at +2 sec per day right out of the box.

[nicolasg]

A quick (not fully comprehensive) 7S26/6R15/4R** timeline might help:

Mid 1996 – 7S26A introduced

Late 2005 – 6R15A introduced, based on the 7S with Etachron regulator and Spron 510 mainspring

Late 2006 – 7S26B introduced with Etachron regulator

Late 2006 – 6R15B introduced

Mid 2008 -4R15 and 4R16 introduced, based on 6R15 but minus manual winding and hacking

Mid 2011 – 4R36A introduced along with other variants (35, 36, 37, 38 & 39)

Late 2011 – 6R15C introduced – changes:

addition of one jewel on main plate (thus, 23 to 24 jewels)
modified ratchet sliding spring
modified date indicator maintenance plate
new balance wheel
new barrel
Late 2011 – 7S26C introduced – changes to date mechanism, plates, balance cock, changes to pinion heights for better hand clearances

[charisps]

Seiko SMY137P1...το explorer του φτωχού 

[george_]

Seiko SMY137P1...το explorer του φτωχού 

δεν ειναι καλο?