Vintage Japanese or Chinese Floral Silk Painting

Huge Asian floral and bird mural silk painting, purchased at a local Chicago sale. Sellers estate told me they were purchased from a gallery in San Francisco in the early 1980's. I have no idea as to their age. They measure about 42" tall and 80" long. Made of a heavy paper with silk applied to the surface. The hand painting is vivid and exquisite. I've tried to picture the marks as best as I could. I have another mural the same size in a muted color countryside design - I will try and post that one too. I'm looking for any information and trying to deterline the age and value. Thanks!