It is a hand painted duck in flight that is quite large. The book "The Art of Gaman" shows some of the craft items that were created in the Japanese internment camps during the 1940s. I read that there was a bird crafting class, shell assemblage, painting class and they made other carved wooden pieces. This example was heavily lacquered, on its reverse there are a few spots where the artist did not fully cover the entire surface- Robin's egg blue paint shows thru.
This example has a distinct Pacific Northwest look with old lacquer that has yellowed with age with and open "c-clasp". The item "1940s vtg Painted enamel bird Japanese Asian WWII camp brooch wood old push pin" is in sale since Tuesday, October 6, 2015. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Costume\Retro, Vintage 1930s-1980s\Pins, Brooches". The seller is "dasjumes" and is located in North Canton, Ohio.This item can be shipped to United States, Canada, United Kingdom, Denmark, Finland, Hungary, Japan, Sweden, Belgium, France, Ireland, Netherlands, Spain, Germany, Austria, Israel, Mexico, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait.