This is a catalog for handmade flutes from Altus, one of Japan's leading flute makers. Based in Azumino City, Nagano Prefecture, Altus is favored by top players worldwide, particularly for its precise intonation achieved through its unique "Altus Scale" and its rich, complex tone. Key Features of Altus Flutes: Altus Scale: A unique scale developed in collaboration with world-renowned flutist William Bennett, achieving accurate intonation and a balanced sound. Carefully Selected Materials: Altus uses a variety of silver materials, including standard sterling silver (92.5% silver content), higher-density Britannia silver (95.8%), and its unique "Altus Silver" (94.6%), which pursues the sound of old French flutes. Traditional Manufacturing Methods: The flagship model "AL" and others are made using the traditional "rolled tube method," where a single silver plate is rolled to form the tube, producing a delicate yet powerful and unique tone. Smooth Playability: The key mechanism is highly precise, known for its smooth key touch that reduces stress on the fingers. Thank you for your interest.