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The 3130 is distinguished from the 3000 by several features; whilst it still beats at 28,000bph it now uses a balance bridge rather than a balance cock and also has a Breguet overcoil hairspring; this means that now all Rolex movements will feature these two company signatures. Also introduced on the 3130 are a new style of reversers for the automatic movement; these are much more efficient than the ones currently used and are an offshoot of the ones introduced 2 years ago on the 2235 lady’s movement. It can safely be assumed that the new reversers will gradually be introduced across the rest of the range, but it is rare that the “base” movement gets technological advances before the more “high end” variants.
Hacking: When moving the crown from position 3 (hand setting) to position 2 (manual winding), the second hand resumes operation before the crown actually 'clicks' into position 2. And if you release pressure before the crown clicks into position 2, but after the second hand resumes, the crown springs back out and the second hand hacks again. The pressure on the balance through the "stop seconds lever"/"balance stop spring" can be released and reapplied before the crown/stem moves into the indexed position. This happens if you hesitate while pushing/pulling the crown/stem into position allowing the balance to start and stop before the crown/stem locates. The hacking mechanism uses a thin, flat brass plate to put pressure on the balance wheel. When the pressure is removed the watch resumes ticking which apparently is not at the same time the crown clicks into position.
Item created by: gdm on 2018-10-11 19:06:36
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