:cny:All you hear about is the dead ones,
A recent investigation into a Chinese chrono with the
additional sub dial at the 6 o'clock position found the movement to be devoid of
oil except for the balance. In that instance it was apparently done on purpose
to reduce friction on the additional parts and allow the watch to keep running.
When one almost triples the number of gears in any mechanical device, one of two
things is going to have to happen, 1) the power input will have to be increased,
or 2) the drag due too friction will have to be reduced. The "El Primero" 7750
(not to be confuse with the standard 7753 style layout[1]) simply runs the base
except movement at very nearly it maximum capacity.
. There are two different horizontal tri-compax automatic chronographs based on
the 7750 available from China. One has the El Primero lay out (not my writing this was copy and pasted from WUS) (I think he meant the Rolex 4030) was with the running
seconds at 6, and the minute and hour counters at 9 and 3 respectively. The
other has the same layout as the base 7750, except the minute counter is moved
to the 3 position; and unlike the ETA/Valjoux 7753, which shares the dial
layout, the Chinese version manages to keep the quick set date function, big
plus. This movement is the one to get if you need a horizontal tri-compax
automatic chronograph. I have only heard of the "el premero" 7750 being used in
counterfeits (replica)
Chew on that a minute fellas...
