1937 $1 Federal Duck Stamp RW4 artist signed! Beautiful must see

Got this old 1937-1938 Federal Duck Stamp for sale. It's the $1 Migratory Bird Hunting Stamp featuring the Greater Scaup design by J.D. Knap. This one is signed across the front which is pretty common for these since they had to be signed to be valid back in the day. It's got some age to it obviously but still a cool piece of history for any stamp collector or waterfowl hunter. Not a professional grader or anything so check the photos for the condition.