11.—Where a person, while committing or appearing to be about to commit an offence, or in the course of a dispute or fight, produces in a manner likely unlawfully to intimidate another person any article capable of inflicting serious injury, he shall be guilty of an offence and shall be liable—

( a ) on summary conviction, to a fine not exceeding £1,000 or to imprisonment for a term not exceeding twelve months or to both, or

( b ) on conviction on indictment, to a fine or to imprisonment for a term not exceeding five years or to both.