Thank you Jeff. The number is 1419 * *
There is a hand engraved number on the edge of case back which starts with CP and 9 digits number. Looks similar to the way watchmaker
engrave their data on the inside of the case back.

: I just looked at around 25 Reference 1163 T Autavias (Sifferts),
: across a range of batches / serial numbers, and all of them have
: "Swiss" on the dial, above the date window. It would
: be interesting to know your serial number.

: The small numbers, toward the edge of the case-back, typically are
: a code for watches that were sold in the domestic Swiss market
: (in other words, not made for export). This marking usually
: begins with the letter "C".

: Jeff

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