Phineas and Ferb, Perry / Agent P Bracelet, JAPAN, 

Alternating Agent P / Perry motif (see photo)

Also: It's melon scented. Because Japan. 

From the personal collection of Swampy Marsh, co-creator of the Phineas and Ferb TV show. 

Signed by Swampy Marsh! (see photo). 

Portion of proceeds to benefit A Walk On Water charity!