Unique Austrian Pneumatic, Air Gun with Spring Bellows, Late 18th Century. A unique and highly unusual example of early pneumatic arms technology, this Austrian air rifle dates to the late 18th century and operates via a concealed spring bellows mechanism. The spring is manually using a special included key inserted at the rear of the butt. The rifle is loaded from the breech and designed for precision shooting. This rare type of pneumatic system, allowed for smoke-free, quiet operation, making it suitable for both discreet hunting and early military experimentation. The air reservoir is housed within the wooden stock, and the key used to wind the spring is an integral part of the set. Preserved in original condition with minor wear from age and use. An important addition to any advanced collection of early air weapons or 18th-century experimental arms. Overall length: 118 cm. Caliber: 5.4 mm.