Piazza Lovatelli, 1 00186 Roma, Italia
Termenii vanzarii
Vezi demo
Venerdì 27 maggio 2022 ore 15:00 CEST
Licitația a luat sfârșit
|
LOT 200:
BULOVA ACCUTRON: gold wristwatch, 1960s 18k gold case, champagne dial with Roman numerals ...
Mai mult...
|
|
|
Vandut pentru: €750
Preț de început:
€
750
Preț aproximativ :
€1,200 - €1,600
Comision casă de licitații: 26%
Mai multe detalii
|
BULOVA ACCUTRON: gold wristwatch, 1960s
18k gold case, champagne dial with Roman numerals, original plexiglass. Original leather strap.
Case diameter 34 mm.
Item condition grading: ***** excellent. Serviced.
Original case.
The first Bulova Accutron was released in 1960 and represented a revolution in the watch industry as it was the first electric watch with a tuning fork, the first to use a bipolar transistor and the first watch without a spring or balance. At the time, the Accutron (accuracy through electronics), invented by Max Hetzel (5 March 1921 - 2004), was the most accurate wristwatch ever made.
The Accutron has an oscillation frequency of 360 Hertz; some later models have different frequencies, but the main characteristic of this type of watch is to emit an audible note of constant frequency, hence the name sonic watch.
The other distinctive feature is the continuous rotation of the second hand: whereas in a quartz watch it clicks every second and in mechanical watches it appears to turn continuously, in tuning fork watches the motion is practically uniformly circular as the hand moves at the speed of the index wheel, i.e. 300-320 times per second.
More than 4 million watches were sold until production was stopped in 1977.
