Disney pins are a type of merchandise that goes back to the opening of the first Walt Disney Parks and Resorts, which was in 1971. They are pins depicting characters and locations that are property of and iconic to The Walt Disney Company. Pins are frequently released at special events, movie premiers, pin trading events, or to commemorate the opening day of a new attraction, and some are exclusive to employees. By now, over 60.000 pins have been produced. Of those, around 30 are part of Darkwing Duck, with a few more if Launchpad McQuack and Gizmoduck pins are counted when there's no indication if they are made in context of Darkwing Duck or DuckTales. This puts Darkwing Duck third place in terms of pin count among the entire The Disney Afternoon lineup, coming in after TaleSpin and Chip 'n Dale Rescue Rangers.
PIN 6829 & 11937: These pins were given out at a press conference/stockholder event for Disney in 1989 or 1990, whis was held to promote all the new shows in development. At this point Darkwing Duck was still in production as Double-O Duck and the two pins are the only merchandise ever produced for this prototype version of the franchise. The difference between 6829 and 11937 is that the first has letters in white and the latter in black. 11937 is rarer than 6829, but it is unknown in either case how many pins were produced.
PIN 2356: This pin was released in 1991 as a promotional move for the Disney Channel. It is unknown how many pins were produced.
PIN 92583: This pin was made available in December 6, 2012 as part of The Disney Afternoon Mystery Set, a set of 16 pins total. It is a common pin.