Hi
@M'Bob
Although we check all six positions as this gives us an idea of how the watch is set up, Omega only call for three position testing with this calibre and allow 20 seconds variation at full wind - have a look at Al's post here:
https://omegaforums.net/threads/spe...affect-the-accuracy.83900/page-3#post-1567772
Those three positions are Dial Up (DU), 6 High (CL) and 9 High (CD) so, your delta is from -72 to -104 to -60 = 44 seconds/day maximum. This is out of spec and, obviously, the whole watch is set about a minute and a half slow but the latter could just be an unwanted movement of the regulator due to a shock in transit. There is no specific amplitude requirement at full wind, only at 24H and an allowable drop when the chrono is engaged.
As we have all six positions, we can read some more information. It's not all bad news: the beat error is in spec although varies more than I would like; the amplitudes are fair (I am hoping the CR value is a mistake but this is 12 High and is not an official test position anyway so it would be hard to be too critical of that - still it would be odd as it is so low); DU and DD are consistent within the accuracy of your machine.
You should also do the 24H tests where there is an official amplitude requirement, the power reserve test, and the amplitude drop when the chrono is engaged.
Based on what I see so far, it looks to me as if you should return this watch and say it is set slow (clearly) and the delta between positions is too high for a service to Omega standards. This does not necessarily mean a completely new service - looking at your numbers I would say that either the hairspring is not central in the regulator pins or there is a poise error with the balance. The first of these can be resolved without any movement disassembly and the second just by running all the vertical tests with an amplitude of about 180 degrees, removing the balance and adjusting the poise. The change in beat error for CD and CR (where the vertical rate is fastest) makes me think that it is just the hairspring not being central and resting on one of the pins (I suspect it is on the inner pin with these two being the fastest rates but a visual inspection is very easy) - centralizing this is a very quick fix.
Good luck, Chris
