Also wanted to add, I've only ever seen the bridges of Heuer Valjoux 92 movements with either HEUER LEONIDAS SA (post 1964 merger) or ED. HEUER & CO SA (pre 1964 merger). This is is the only Heuer 92 I've seen with Heuer only on the bridge. Could it possibly be a franken-movement?

: Hi there, hope everyone is having a great holiday season! I'm still
: in the process of learning all I can about the Carrera before
: purchasing one, and came across this one today with MN and SOX
: on the movement. The seller says its possible the bridge could
: be a replacement. In this case, what is the significance of the
: MN? Does this mean it is a 92 movement not made by Heuer? Would
: this affect the value of the watch? Does anything in this
: movement strike anyone as off?

:
:

: Also the crown is unsigned. Should Carrera crowns be signed to be
: original? Or was there a phase in production where they were
: unsigned?

:
:

: The Crystal and tension ring are apparently NOS replacements. I
: don't mind this as long as it is authentic to the period.

: Would love to get your collective wisdom on this and always looking
: to learn more about these beautiful watches. Wishing everyone an
: excellent New Year!