red 'un

plural red 'uns

1. UKobsoletethieves' cantA gold watch.

   Arthur Morrison, Chance of the Game But if the clock was a red 'un, and the opportunity undoubted; to be pinched in the Bow Road merely might well imply loss of caste in the mob, but nobody need be ashamed to be pinched anywhere for a gold watch, after all.

   1 more example

   R. Austin Freeman, A Savant's Vendetta 'Do you know a jerry when you sees one — a red 'un, mind you?' […] The fellow looked furtively at the door and then, diving into an inner pocket, pulled out a handsome gold watch with a massive chain attached, exhibited it for a moment and then dropped it back.