(Replying to myself...):

As the picture shows, my Mareographe has a "regular" button at the 9 o'clock position which, I assume, will do the same function as the "little (recessed) button on the outer edge of the watch"

JL

: Hello, Jeff and all,

: My father in law has a Heuer Mareographe
: Autavia exactly like the one pictured in
: your message, which he purchased in Germany
: in around 1970.

: I've seen the instructions for the Seafarer
: you've uploaded (thanks!), but, in the
: Mareograph I cannot find the "little
: button on the outer edge of the watch "
: ("Using a pin or end of a paper clip
: depress the little button on the outer edge
: of the watch time after time, until the
: Lunar Dial, which is moved by this button,
: registers the correct Tidal phase or Solunar
: Period")

: Help, please?

: Thanks, regards,
: JL Balcells