This is a rare 5 inch float with a double seal that has maker's marks stamped on both seals.  There's a 'DGB' stamped on the seal button.  There's also a 'DGB' stamped on an ID Seal. 

This version of the DGB mark seems to be undocumented, as it does not appear in any of the field guides.  It differs from WP #136 DGB which has a backwards B.  It also differs from WP #139 DGB that has a backward D.  This maker's mark shows all the letters 'D', 'G', and 'B' as they appear in the alphabet.

The float has thousands of bubbles and I think this adds to its attractiveness as a display float.

This float comes with excellent provenance; it's from ex-Stu Farnsworth collection.