The NPS History of Workshop Chops Poster is an attractive 11” x 17" full color print of the all NPS workshop chops since 1993 with a beautiful gyotaku print in the background. It is also a fascinating way to view the history of NPS workshops through the progression of the ‘chops'. Each ‘chop' or ‘stamp’ was designed and created by an NPS member and denotes the year and location of each workshop. Some NPS members have been collecting these chops for years and enjoy the tradition created by this process.