Clk » 16 Ara 2009, 20:15
Tag, Miyota 21 Jewels dedigin makinenin Miyota 8215 oldugundan yola cikarak ETA 2824-2 ile yapilan karsilastirmasindan bazi bölümleri ingilizce ekliyorum. (su an cevirecek zamanim yok)
Cost - The 25 Jewel ETA 2824-2 Automatic Movement can be purchased from Ofrei (A large watch materials house) for about $78. It is employed in watches costing thousands including the Rolex Tudor Submariner. The 21 Jewel Miyota 8215 costs about $37 and is used in watches priced from $100 and up.
BPH - Beats per hour. ETA 2824-2 28,800 BPH or 8 beats per second (4 Hz) vs 21,600 or 6 beats per second (3 Hz) for the Miyota 8215. Most mechanical movements run at 18,000 BPH or 5 beats per second (2.5 Hz). Both movements have higher than average BPH a plus.
Power Reserve - Power reserve is the number of hours a movement will run when fully wound. Most mainsprings will power a watch for 30 hours or more. The ETA has about a 40 hour power reserve, the Miyota has a 45 hour reserve.
Jewels – The ETA has 25 Jewels and the Miyota has 21 Jewels. Jewels, typically synthetic rubis are used in watch movements, not to add to their value, but to reduce friction and wear on moving parts. Lower end watches may have only 7 to 15 jewels. The standard for quality watches is 17 jewels or more. There is an upper end to the number of jewels necessary, typically, anything over 25 jewels for these types of automatic movements are just for decoration.
ve daha bircok karsilastirmasi var ama hicbir karsilastirmada Citizen'in Miyotasi cok ta geride kalmiyor ve sonuc olarak su cikiyor
Based on price, the Miyota 8215 by Citizen is a great value and would be a good choice in an everyday watch or weekend beater.
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