Alpina Watch Seastrong Diver Extreme Automatic AL-525BO3VE6. Alpina Watches mission is now and has always been to manufacture extremely reliable professional sports watches, respecting and implementing the “Alpinist Principle” in manufacturing, design and technological innovation. Innovation, when combined with purpose, becomes progress. At Alpina, the innovations are exclusively devoted to serve the functional and design needs of those individuals challenging the hardest places on earth. Such as the Alpine summits.