Was the Hotchkiss three-pounder 57 mm or 47 mm?

Was the Hotchkiss three-pounder a 57 mm gun?

No. A check during the exchange corrects the caliber to 47 mm.

The three-pounder Hotchkiss is initially identified as a 57 mm gun. A viewer challenges the figure, prompting an immediate check and a correction to 47 mm. The exchange shows how easily projectile weight, gun designation, and caliber can be confused when several early rapid-fire weapons are under discussion.