Antique Bradley's Rainbow Papers, Art Advertising Sample For Sale

*Inherited original artwork and artist supplies from my cousin. She was an illustrator in New York from the early 1920's through the 1940's. I will be listing many of her original art deco ads, proofs and illustrations. She was born in 1900, went to art school at KU and passed in 2000. I'll do my best with descriptions - but please review the photos.Happy to answer questions and combine shipping.*
Colors are vibrant.Right edge is cut/frayed.Six of the 30 sheets have a hole punch.Each sheet has a number and color.The back is the last sheet - no. 30 black.I'm assuming my cousin removed the back, trimmed the edge and hole punched the sheets for some work she was doing at the time.Measures 2 1/2 by 5 7/8 inches.Probably made by Milton Bradley Papers.Distributed by Thomas Charles Co in Chicago.Unknown year, probably the early 1930's