Rare 1967 Bulova Accutron 10K Gold Men's Back Set Quadrant Dial Watch - Original Bracelet
The Bulova Accutron was the world's first electronic watch. People sometimes refer to the Accutron as the worlds first electric watch. This isn't quite true, but as it was the first to use a bipolar transistor it certainly deserves the former accolade. The first Accutron was manufactured in 1960 and was the watch chosen by some of the 'Original Seven' NASA astronauts to accompany man on his first journeys into space.
The watch uses a tuning fork as its prime moving element. It is a well understood physical principle that the faster your initial reference the more accurate your time keeping will be. The most accurate clocks nowadays use the vibrations of a cesium atom as their reference. In the 1950s, the best mechanical watches could rely on a prime moving element with a frequency of around 2 Hz (That is two 'beats' per second). Max Hetzel an engineer employed by the Bulova Watch Company of Bienne Switzerland designed an electrically excited tuning fork movement with a a frequency of 360 Hz. Bulova claimed an accuracy of 2sec per day or 1 min per month. This was the only movement capable of the accuracy demanded by spaceflight. Accutrons were used as time references in many satellites and also to control some of the Apollo moon experiments.The Tuning Fork Movement is absolutely unique in operation emitting a distinctive hum and featuring a sweeping seconds hand.
Some Accutron Facts (Engineers take note this was achieved in 1960!!)
- The index wheel boasts 320 teeth each of which is ten microns in depth
- For a thirty year old watch this means that over 2.8 E+11 teeth have have moved under the pawl jewel.
- The Accutron was used to correctly dimension Greenland for the first time.
- Each coil boasts 8000 turns of wire, the diameter of which is 15 microns.
- Assertions movements were used in the Apollo space craft panel clocks.
- The Bulova Accutron was the first wristwatch to use a Bipolar Transistor.
This watch is in Pre-Owned condition
PLEASE REFER TO THE PICTURES
This Unique and Beautiful Accutron has 10K rolled Gold filled Bezel.
Beautiful Qaudrant Dial features Original gold-tone Hands and gold-tone hour Markers at all hour positions.
This is a VERY RARE Back Set Model
Case measures 34mm diameter
Watch comes with Gold-tone Original Bracelet
Watch comes without box and papers