The Genuine 1920's Negretti & Zambra pocket weather forecaster is a rare and valuable piece of scientific collectable from the United Kingdom. Made of celluloid, this barometer is a true representation of the early 20th century's scientific instruments. The craftsmanship and design of this pocket weather forecaster make it a sought-after item for collectors and enthusiasts alike, showcasing the elegance and functionality of traditional scientific tools from the early 1900s.