• The Blade: It features a traditional 11-inch overall length (usually a 5-inch blade) in the classic Bayonet style. A bayonet blade is recognizable by its flat-grind bottom edge and a partial unsharpened false edge (swedge) on the spine. 
  
• The Mechanism: This is a swivel bolster release automatic knife. Instead of a "picklock" mechanism (where you manually lift a metal tab to close the knife), you press down or sideways on the pivot bolster (the metal cap at the top of the handle). This swivels the bolster out of the way, lifting the backspring lock to safely fold the blade closed. It is deployed using a front-loaded push button and usually features a sliding safety lock nearby. 
• The Handles (Scales): The scales are made of genuine Stag (deer antler). Stag handles are highly prized by collectors for their rugged, textured grip and natural, rustic brown-and-white color variations.
• The Liners: Underneath the stag scales, the knife features internal brass frames and liners, held together with steel or nickel-silver pins. 
  

1. The "B ROSTFREI" Tang Stamp: In the 1950s and early 60s, Italian switchblades typically used "INOX" or specific cutlery markings. The clean, crisp text script of "Rostfrei" (meant for the German or broader European import market) paired with the "B" identifier became heavily utilized by Frank Beltrame during the late 20th century. 
2. Swivel Bolster Dominance: The swivel bolster release was heavily standardized during this era because it was safer and more efficient to manufacture than the older 1950s picklock design. 

• Spring Maintenance: Traditional Italian stilettos should always be stored in the open position. Leaving the knife closed for long periods keeps the kick-spring under constant high tension, which will eventually weaken or snap it. 
• Stag Care: Genuine antler can shrink or crack over decades if it dries out completely. Keep the handle healthy by wiping it occasionally with a tiny amount of mineral oil.

• Condition is near mint, light scratches on blade,  see all photos

NKCA Grading system

MINT: A factory fresh knife, absolutely original as it came from the manufacturer, not carried or sharpened, a perfect knife.

NEAR MINT: A new knife that has seen sometimes, show some slight carry or shop wear, blades snap perfectly, handles show no cracks.

EXCELLENT: Shows no more than 10% blade wear, handles are sound, no cracks, blades snap good.

VERY GOOD: About 25% blade wear, slight cracks in handles, may have one lazy blade, stamping clearly visible to the naked eye, no blades changed or repaired.

FAIR: 50% blade wear, blades lazy, cracks and chips in handles, handles replaced with same type, blades repaired, stampings faint but readable with a glass.

POOR: Blades very worn, handles bad or missing, blades have been replaced with the same type, reading of the stamp is almost impossible, even with a glass, good mostly only for parts.