: Very unusual, it most likely incorrect, however I have seen this
: type of Valjoux 72 with some brass parts before, so it is not
: 100% out of the question, but we would need to know more
: info....

: What is the code on the bottom left hand side of the base plate?
: There should be R for Valjoux and 72 for the movement on the
: right side and then normally MN on the left. It is normally MN
: on Valjoux 72 (1st execution Ed Heuer Autavia 2446 and the very
: earliest Ed Heuer Carrera 2447 are the exception whereby there
: is no two letter code).

: However I have now seen two original Carrera 2447 with AR on the
: base plate with brass Heuer Leonidas bridges which have the
: words "Seventeen 17 Jewels Unadjusted, Swiss" also on
: the bridge, instead of on the left hand side of the plate. (AR
: is the code for Enicar). Yours has no "17 Jewels" info
: though.

: I am told that the some watchmakers constructed watches for both
: companies. It was a cottage industry back then, some Enicar were
: even constructed at Heuer in Switzerland and also in busy times
: much work was done "overtime" at watchmakers houses
: also including their relatives also.

: R

Much appreciated. This movement is fitted now on an Autavia 2446 Third Execution, so I don´t know if it helps. I will try to get better scans and check on your requests about the codes, if any.

Regards