Most collectors recognize the Astra 300 by its unique tubular shape and finely checkered hardwood grips. Many thousands were “bring backs” by returning U.S. servicemen from WWII.
Have you ever seen a WWI / WWII era 7.65 mm pistol with this kind of marking on the slide? If so, it indicates post‑WWII use by the Norwegian Police.
The redesigned Astra 600 used 9x19 mm ammo, compared to the Astra 400 which used 9x23 mm Largo, unique to Spanish arms. These Astras are displayed on an Armory Racks® 4-Gun rack.