Here's on of my favorite marks, it's WP #258.  This stamp is clear and complete, showing all points.

This float is a nice light green color and measures 3 inches in diameter.

In Walt Pich's book 'Glass Ball Marks', he details the history of this mark.  Apparently, 6 or 7 of these floats were found on the Marshall Islands around 2008 and sold on eBay.

I feel very fortunate to be one of those lucky eBay buyers who were in the right place at the right time to acquire this beautiful mark!