Vintage Alhambra Mounted Patrol Jacket Equestrian K-Brand Yellow Shriner Horse

This is a really cool vintage jacket made by K-Brand. Appears to be early 70's vintage. The jacket's patch reads "Alhambra Mounted Patrol". I'm not sure if this was a Shriner's jacket or something else. Condition: Jacket is in very good condition for its age. YKK zipper operates super smoothly. There are a few pinhead sized black spots and a light mark that looks like pencil. See detail images. Size: There is no size noted on tag, however I would say this would be a Small-Medium in today's sizing. Please note the measurements below: Shoulder to shoulder 17.75" Chest (pit to pit) 21" Sleeve length from shoulder 23.5" Shoulder to hem 23.75"