This looks like a freemason society logo or something. A google search hath revealed it is a posh prep school for kids!
Vintage navy crew neck with circular yellow print. Inside is printed "Brownell-Talbot, 1863.” A triangle inside with "Fides, Scientia, Fortitiudo." SO CUTE. Label reads "Lee, size small, made in the USA. Youth small." Three visible marks on back of right sleeve, as is.
50% cotton, 50% polyester
Machine washable
Length 17"
Chest 32"
Waist 30"
Hem 25"
Shoulders 14.5"
Sleeves 17"