A 58-year-old man from Dublin admitted possessing two duelling pistols in suspicious circumstances.
In the dock was Sean Lawlor, who has an address in Belfast, who pleaded guilty to possessing the firearms on November 25, last year. The court heard he had brought them to Londonderry to sell them.
Sentence was adjourned for a probation pre-sentence report.
The court heard the pistols dated back to the 1920s.
Lawlor will appear in court on January 26.