recognition pin?

[AlphaSigOU]

Here's my fraternity's description of its recognition pin:

The Recognition Pin and Monogram Pin - The Recognition Pin is a small replica of the open book with its hieroglyphics and pen. The Recognition Pin permits members unknown to each other to recognize the common bond of our Fraternity when the Badge is not worn or obscured by the suit jacket. The Monogram Pin is a simple gold pin with the Greek Letters. Both of these pins are worn on the left lapel of a suit or a sport coat only by initiated members of the Fraternity.