Hola Toni, si me referia al sistema antichoque, muy original y supongo que anterior al Incabloc.
Todos los calibres Accutron, 214, 218, 219, 224 se fabricaban en Estados Unidos, recuerda que posteriormente el mismo Max Hetzel, (Suizo, Verdadero inventor del sistema), lo perfecciono y con el grupo Omega-ESA lo fabricaron para todos estos calibres :
Aqui te dejo un poco de paja y las marcas y calibres que lo utilizaron.
Developed jointly by Omega and ESA under license from Bulova, these tuning fork movements, designed by Max Hetzel were used by many of the Swiss makers in the early to late 1970’s.
This was a Chronometer grade movement, with a -/+ of 2secs per day, although it appears that only Omega's f300 and certain Certina Certronic models that were marketed as such. They are prone to some drift caused by temperature change, but can be adjusted to compensate depending on the local climate.
Relatively expensive to produce it was eventually killed off by the influx of Quartz movements of the day, which were generally cheaper to manufactuer and considered more reliable.
Briefly resurrected by Technos in the early 90’s who produce a limited run of 10,000 pieces with old stock and parts purchased from ESA. Probably the reason why parts are so scarce today!
Perhaps the most commonly known watch to feature these movements is the Omega f300, which was available in a vast array of styles and models, featuring both Date only (cal 1250) and Day/date (cal 1260). A Chronograph version was also produced, more on that later.
Some models are quite common and at current values are reasonably cheap to acquire, there are some rarer variants, most notably the diver versions, Asymmetrical ‘D’ shaped Constellation and several models produced in both solid 9kt and 18kt gold.
To my current knowledge the following makers all produced models featuring the ESA tuning fork movement.
· Baume & Mercier – Tronosonic (cal 19162, cal 19164)
· Bucherer Electronic ( unkown)
· Certina - Certronic/c-tronic (cal 29-151, cal 29-152)
· Derby - Derbysonic (Longines movements)
· Eterna - Eterna Sonic (cal 1550, Cal 1551)
· Imado - Tuning fork ( non branded)
· IWC - Electronic, sometimes known as Edison electronic ( cal .150, cal .160)
· Longines – Ultronic (cal 6312, cal 6332 )
· Rado - electrosonic I think (possibly in conjunction with Certina)
· Technos – Tuning fork Mosaba. Limited run in the early 90’s some 10 yrs after production of these movements had stopped.
· Tissot - Tissonic (cal 2010, cal 2020)
· Titus – Tuning fork (not branded)
· Zenith – Xltronic, also marketed as Allegro and Movado (cal 50.0 and cal 50.5)
Saludos
¿Es fabricado en Suiza bajo licencia Bulova o es un desarrollo propio de IWC? Creía que todo y que Bulova era Americana los calibres Accutron se fabricaban en suiza, como pasaba con sus movimientos mecánicos.
