This early 1960’s Benrus Diver was made in Germany and is powered by a Benrus signed, 17J, French made Lorsa-P75A manual-wind movement. It’s comes from a wonderful family tree with its more famous brothers the Ultra Deep & Sea Lord models.
New acquisition, a poor man's Longines Nautilus, but with the shard indices found in an Eterna Kontiki first execution. I guess that makes this a Nautiki 😉