Just to note that the tachy ring is not exactly like the ones we generally identify as first execution/second execution:

Fonts are smaller (see distance between numbers 300-350-400 compared to others, also height of 'TACHY' word)
and there are other differences (see there is no dot at 450).

I would say it is simply an early tachy ring we did not have seen yet.

: Best / simplest explanation seems to be that this case was
: produced early in the cycle, but by the time the watch was
: assembled, they were using the second execution dial and hands.
: So indeed, this looks like a "correct" second
: execution 1158S. One thing that we have learned about the
: automatic Carreras, in general, is that we cannot establish
: which tachy ring belongs in which execution.

: So this one looks "correct", using our usual standards.

: Jeff

: +++++++++++++++++++

: