The picture below shows a larger view of all (5) Unused 1998 Wildlife Fund Advertising Metal Duck Pins in this lot. The two top pins are identical and have a brass finish. The two bottom pins are both enameled with a different color background. The center pin has a clear coating. These were most likely given out when a donation was made. They are marked on the front and back as follows:
THE WILDLIFE FUND 1998 PINTECH (phone number)
The pins measure 1-1/8'' x 1-1/4''. They all appear to be in mint condition unused as pictured. Four of them are unopened.