I pictured the darkest spot on this item, it is near the seam under the arm. There are some other very faint spots that are similar, they would not show up in a photo. Looks like a natural condition created in the felting process. The dots along the underarm seam on the sleeve are tailors. 

Cream wool embroidered Asian Souvenir jacket. Excellent condition, As found

Measurements

Seam to seam underarm 17" best fit 32 bust. 
Hip: 34"
Hemline: 34"
Shoulder: 14.5"
Sleeve; underarm seam: 17"  ~ Shoulder to cuff top of sleeve: 22"
Length: 27.5"