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Saturday, March 29, 2014
Seiko 6217-8001
Monday, March 24, 2014
Happy gathering
Vintage Omega constellation black dial
Sunday, March 23, 2014
Vintage Omega Seamaster & Constellation chronometer
For a watch to earn the title of "chronometer", the movement has to pass a very strict battery of test under very strict control at the most renowned official testing organization, the C.O.S.C (Controle Officiel Suisse des Chronometres). The testing last for 15 consecutive days. For the first ten days, the movements are tested in five positions at 20 degrees Centigrade. Three of the positions are vertical: 3 o'clock left, 3 o'clock up, and 3 o'clock down. Two test are horizontal: dial up and dial down.
After that, the movement is left in the horizontal, dial up position, and the temperature is lowered to 4 degrees Celsius for one day. Then it is raised back to 20 degrees Celsius for one day. Then the temperature is increased to 36 degrees Celsius. For the last two days of the test, the movement is moved back to vertical 3 o'clock left position and the temperature is lowered back to 20 degrees Celsius.
- The timekeeping of the movement is recorded daily, and at the end of the 15 day test, calculations are made in six different areas. The different areas are:
- 1. mean daily rate in the different positions.
- 2. mean variation.
- 3. maximum variation.
- 4. greatest difference between the mean daily rate and any individual rate.
- 5. variation of rate per 1 degree Celsius.
- 6. resumption of rate.
- The variances allowed are very small. The mean daily rate must be within -4 and +6 seconds per 24 hours.
Omega Constellation watches are chronometers with the movements being tested for 5 postitions and temperatures. It is usually marked on the movments.
The vintage chronometer movement calibers are as follows: 354, 504, 505, 551, 561, 564 and 751. The calibers 562 and 565 were NOT used in Constellations. They were used in Seamasters.
One thing to watch for, is, a 562 or 565, which states on the movement that it has been adjusted for 5 positions etc. It is a fake! Somebody took the Automatic rotor and train bridge from a 561/564 and slapped it onto a 562. I have seen Constellations running a cal 750. Such examples are also fakes regardless of what the Bestfit manuals state. Those manuals are designed only to find a substitute for hard-to-find parts.
Saturday, March 22, 2014
Seiko 6217-8001
Weekend watch gathering
Friday, March 21, 2014
Vintage Omega constellation black dial
1943 | 28.10 RA PC, 30.10 RA PC, 330 |
1945 | 28.10 RA SC PC |
1947 | 331 |
1949 | 332, 351 |
1950 | 343, 350, 352 |
1951 | 353 |
1953 | 344, 354, 355 |
1955 | 450, 455, 470, 471 (possibly 1956) |
1956 | 490, 491, 500, 501, 502, 503 |
1957 | 504, 505 |
1959 | 550, 551, 552, 560, 561, 562, 570, 571 |
1960 | 590, 591, 592 |
1961 | 593 |
1963 | 660, 661, 670, 671,680, 681 |
1966 | 563, 564, 565, 710, 711 |
1967 | 712, 750, 751, 752 |
1968 | 672, 682 |
1969 | 980, 1000, 1001, 1002 |
1971 | 683, 684, 685, 1040 |
1972 | 1010, 1040 |
1973 | 1041 |
Vintage Omega Constellation cal 504
這是一支「曲耳八卦面蒼蠅字」cal 504,18K金星座錶,多年前聽到我的師傅李先生說這一支是多麼多麼值得收藏。二十幾年來雖然記在心中,時時留意,但還真的不容易找到. 過了廿年終於找到了.
Saturday, March 15, 2014
Problem with signing in
I am facing issues with saving my blog with photos and I cannot seemed to log on using my ipad. Perhaps, the days have pme to end the blog....
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