Some photos of a Sterling Atlantic 43:
https://sysyachtsales.com/yacht-search/2020/sterling-yachts-atlantic-43/926288
Looks a bit like the Pinasse boats that were built a few years back in aluminium by Mittelmann Werft in Germany to a Nissen design.
Too high quality/price with limited internal volume, to find a market. Loa 10-16m, not many were built
https://www.facebook.com/Pinasse/about/
Yachtdesign Georg Nissen => Motorboote => Pinasse 46