MAHLER Posted May 4, 2006 Report Share Posted May 4, 2006 Snooping among my old magazines of clocks I have found an interesting article on the chronometer. I have to think that could be made a bulletin of the replicas . You could offer this way an evaluation of the quality of the mechanism adopted by the builders of replicas. Doesn't it seem you can interest? I infuse the chronometer according to the I.S.O. (International Standardization Organization) and the N.I.H.S (Legislation of the Industry Clocks Switzerland) other is not but a way to point out the precision of a wrist clock according to the conditions of use. The C.O.S.C. (Controle Officiel Suisse des Chronomètres), entre that furnishes the homonym certification, foresees that the daily difference in comparison to a schedule of reference both equal to -4 is +6 seconds, for movements with diameter of 20mm, and between -5 and +8 seconds per diem for movements with diameter of smaller or equal to 20 mms. The test is effected for 15 days and for 3 days a thermal test (the clock is set in conditions of cold, heat and averages to es. 8°c, 30°c, 38°c). Then whether not to make a bulletin of our replicas? Here an example created by me. Instructions shortly for C.O.R.C (Control Official Replica of Chronometer) : 1) you syncronize to the beginning of the test yours it replies with a sure reference (to es. a signal radio); 2) every following day to the same one you will now check the difference among yours it replies and the reference annotating the data on the chart (if your clock has gone on of 2 seconds or less than 2 seconds you will mark +2 or -2); 3) you add the daily discards at the end of every week and bring you them in chart (example if our clock has discards of +10, -2, +4, -5, +8, -20 will write +10-2+4-5+8-20 = - 5); 4) you add the weekly discards with the remaining days to end the month; 5) you divide discard weekly for the number of days and you will get discard daily (example +245 : 31 = + 8 seconds or + 245 : 31 = -8 seconds); 6) you divide discard weekly for sixty and you will get discard monthly compared to the minutes (example +245 : 60 = + 4 minutes or -245 : 60 = -4 minutes). Hoping both of some interest.... MAHLER Quote Link to comment Share on other sites More sharing options...
Rolexman Posted May 4, 2006 Report Share Posted May 4, 2006 You really have a lot of time on your hands.... Like the idea though =) I check the time keeping of my watch HERE. Quote Link to comment Share on other sites More sharing options...
MAHLER Posted May 4, 2006 Author Report Share Posted May 4, 2006 time keeping of my watch HERE. Good solution... Quote Link to comment Share on other sites More sharing options...
MAHLER Posted May 5, 2006 Author Report Share Posted May 5, 2006 (edited) I have begun the test on the following clock in my possession : Replica Rlx Sub with Eta 2836 Replica AP Royal Oak with Miyota twenty-one Replica IWC Portoghese with Eta 7750 Replica F. M. Lady Casablanca with Asian Automatic Replica V. C. Malta Perpetual Calendar with Asian Automatic Longines Original Flagship Chrono L650 movement POLJOT Ruslan Chronographs with 23 jewelses. My curiosity is to also know the reliability of the same ones with mine limited means (I don't have a laboratory for my study)... I will make you know.... if someone of you wanted to try the experiment..... Edited June 6, 2006 by MAHLER Quote Link to comment Share on other sites More sharing options...
Kerbus Posted May 5, 2006 Report Share Posted May 5, 2006 I check the time keeping of my watch HERE. Excellent link! WOW!! Mine's exactly on time down to the second! Quote Link to comment Share on other sites More sharing options...
MAHLER Posted May 5, 2006 Author Report Share Posted May 5, 2006 (edited) The movement, according to the CORC, it has to have a monthly discard among -5 or +5. The clock must normally be wears to the wrist (important: when it is driven the vibrations they worsen the performances of the clock. The CORC test the movement under conditions of daily use on the wrist. Edited June 6, 2006 by MAHLER Quote Link to comment Share on other sites More sharing options...
Happy T Posted May 5, 2006 Report Share Posted May 5, 2006 Another good one here if you're in the states. Official U.S. Time Clock Quote Link to comment Share on other sites More sharing options...
MAHLER Posted May 6, 2006 Author Report Share Posted May 6, 2006 in the states. Official U.S. Time Clock Another good link!!! Quote Link to comment Share on other sites More sharing options...
MAHLER Posted May 6, 2006 Author Report Share Posted May 6, 2006 (edited) First results of the CORC : ---------------------------------------------------- Replica : F.M. Casablanca Lady Movement : Asian Automatic Dealer : Street seller Monthly Diff. : -5 CORC: YES ---------------------------------------------------- Replica : V.C. Malta Perpetual Calendar Movement : Asian Automatic Dealer : Street seller Monthly Diff. : -9 CORC: NO ---------------------------------------------------- Replica : Rlx Sub Ultimate Black Movement : Eta 2836 Dealer : Precious Time Monthly Diff. : +3 CORC: YES ---------------------------------------------------- Replica : IWC Portoghese Movement : Eta 7750 Delaer : Street seller Monthly Diff. : -4 CORC: YES ---------------------------------------------------- Replica : A.P. Royal Oak Movement : Miyota 21jwls Dealer : www.replikus.com Monthly Diff. : +7 CORC: NO ---------------------------------------------------- Comparison with : Genuine : Longines Original Flagship Chrono Movement : L650 movement Dealer : Jewelry Monthly Diff. : +2 Perfect : YES ---------------------------------------------------- Genuine : POLJOT Ruslan Chronographs Movement : POLJOT 23jewels Dealer : Street seller Monthly Diff. : -8 Perfect : NO ---------------------------------------------------- Edited June 6, 2006 by MAHLER Quote Link to comment Share on other sites More sharing options...
MAHLER Posted June 6, 2006 Author Report Share Posted June 6, 2006 If others members want to contribute are well accept. Quote Link to comment Share on other sites More sharing options...
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