Limited Edition of 1975 Pieces. Alsta Watch Nautoscaph Superautomatic Bracelet Limited Edition Nautoscaph Superautomatic. Never following fashions and trends, Alsta has a passion for design and craftsmanship. Alsta watches believe in conservation as opposed to consumption and our customers care deeply about preservation of our oceans and lands and their ecosystems. They wear watches that reflect that heritage and ethos and that use sustainable sourced materials where possible.