Vintage 1970's Ulrich's Bar Yellow Striped Ringer Jersey T-Shirt (XS/S)

Item Details:

Brand: Unknown (Tag illegible)
Material: Unknown (feels like soft cotton to me but there's a chance it's a poly-cotton blend)
Color: Golden yellow with white and blue striped collar and cuffs
Decade of Manufacture: 1970s (most likely 1977-1979, but with a chance of early 1980s
Country of Manufacture: Unknown (but almost certainly United States)
Notable Features: Raglan Sleeves, V-Neck Neckline with striped rib collar and sleeve cuffs, Single Stitch Hem

Condition Notes:

Fair to good used vintage condition.
Visible wear on letters of graphic.
Two heavy fabric creases near collar that did not come out with steaming.
Spots of dark discoloration on front near hem, on right sleeve (both front and back), and at right pit.
Additional dark spots on middle of back of shirt. Light fabric wear and fading throughout.
See photos.

Size Notes:

Vintage Tag Size: Unknown (tag illegible)
Modern Measured Size: Extra Small/Small (33.5" chest puts it closer to S than XS)