At the office where I work they have a tradition of issuing these little winged pins for reaching certain employment milestones. I got the first when I completed the initial trial period and became a full time employee. I just recently got my second one, the gold five year pin, for having passed my 5th anniversary with the company. I have them pinned into the cloth wall of my cubicle with a little post-it note illustration to show them off. Here's what that looks like.