Patagonia Mens VTG Koi Pattern Organic Cotton Button Down Shirt size XL

Patagonia organic cotton button down shirt in great vintage condition with no stains, tears or holes. I believe it to be vintage based on the print and the Patagonia tag. The product code tag is unreadable d/t age. Apart from that, the shirt appears almost new. The shirt features shell buttons and is made from a slightly nubby, textured cotton that is substantial and has a slightly yellow tinge - see photos. The print is dark blue, not black, as it may appear. This is a really special shirt. 27 inches pit to pit, and 30 long.