This chip was made by USPC (for the captain?, for a big gambler?, who knows). The reverse is an actual 4-leaf clover sandwiched between 2 layers of celluloid. I guess that makes this the only poker chips containg actual plant life. Note that a yellow chip was used and not the gold color the was used in the regular Tango.

I have 2 other USPC chips that were also modified, only they were modified with 80 year old photos.