.177 [Diana] Model 25, Rare Vintage Airgun (Smooth Bore)

The Diana Model 25 is a classic break-barrel, spring-piston air rifle produced by Diana Mayer & Grammelspacher in Germany, with production spanning from the 1920s to the 1980s. Designed as a youth-oriented rifle, it is compact (approximately 41 inches long) and lightweight (around 5 lbs), making it ideal for younger or novice shooters. Available in .177 and .22 calibers, it features a rifled barrel in most versions, though some early models (like this one) were smoothbore for darts. With a muzzle velocity of around 377–600 fps depending on caliber and pellet type, it delivers modest power (4–8 ft/lbs), suitable for plinking and short-range target shooting at 6–10 meters. Its simple design, often featuring a wooden stock and basic open sights, emphasizes reliability and ease of use, with a light cocking effort of about 14 lbs due to a ball-bearing detent.

The Diana 25 stands out for its quality construction and historical significance, often sold under various brand names like Winchester (Model 425), Original, Beeman, Hy-Score, and Gecado due to post-WWII trademark issues with Milbro in Scotland. Its trigger system varies, with some models featuring a direct sear and others a desirable three-ball-bearing sear with two adjustment screws for a crisp pull, though improper adjustment can lead to a vague trigger. The rifle’s smooth operation, minimal recoil, and adjustable rear sight make it a joy to shoot for casual plinking, though its low power limits its use for hunting. Collectors value its nostalgic appeal and durability, with well-preserved examples fetching $100–$200 today, depending on condition and branding.

Compared to similar airguns like the Slavia 612, the Diana 25 is slightly larger and more powerful, with a focus on pellet accuracy rather than dart shooting. Its articulated cocking link and optional scope rail (in later models like the 25D) add versatility, while its robust build ensures longevity with proper maintenance, such as oiling leather seals or replacing with synthetic ones. For enthusiasts seeking parts or restoration, suppliers like Pyramyd AIR or Protek Supplies offer components, though availability may vary outside Europe. The Diana 25 remains a beloved classic for its blend of simplicity, accuracy, and historical charm, ideal for collectors or those seeking a low-power, high-quality air rifle.