Pebble Beach
Course-Used Pin Flag 

One of the most famous golf courses in the world, Pebble Beach, has long used checked green and white flags on its course. In fact, they are reportedly the only golf course that Standard Golf will make these exact flags for (though nearby Cypress Point has a very similar flag, where the green and white tiles are swapped).

These flags have never been sold by Pebble and have virtually never made their way outside of Pebble Beach, making them even more rare and coveted. This flag was actually used on Pebble Beach Golf Links.