9.1×17R

9mm Portuguese, 9.1 Abadie Revolver

Photo coming soon: side view on a transparent background, with author and license.

Key specs

Type: Pistol
Case type: rimmed
Bullet diameter: 9.27 mm
Case length: 17.63 mm
Overall length: 28.27 mm

Sources

Wikipedia: List of handgun cartridges, Wikipedia