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

:
: Mareographe is the Heuer version of the
: Abercrombie & Fitch Seafarer, which is
: described in some detail here .

: The Heuer Mareographe was introduced around
: 1970, and you can find some photographs
: here .

:

: From time to time, I have seen mention of Heuer
: Mareographes from the 1950's, but I have
: only seen them in the 2446C case, shown
: above (which dates from around 1968-1970).

: Click here to see instructions for the
: Seafarer, which will also explain exactly
: how the Mareographe works.

: Thanks for the question.

: Jeff