Unusual marked Yellow float.  It has mark WP #25 Dai 大 stamped into the glass of the seal button.

This stamp has been pressed into the glass rather than raised above the glass as you'll typically see.

The float measures 7 inches in diameter.

 I purchased this float in Seattle from a seller that had three of these yellow dai 大 marked 7 inch floats.  I bought all three of them.