Grade B1: Two-piece construction, silver gilt with light blue, dark blue, white, red, green and orange enamels, number impressed "6395" on the reverse, 44 mm, on an original B-1 Grade ribbon, intact enamels, light contact, near extremely fine.
Footnote: The Medal of the Brilliant Light was instituted on September 7, 1937, for outstanding performance or exhibiting special technical skills in the Armed Forces.