Booklet - BARKER BROS. INVINCIBLE RADIO, Los Angeles: Barker Bros., 4 pages, soft cover, cream paper, red ink, with radio in "Monterey Encasement" on front cover with title, descriptive text inside, company address (Seventh Street/Flower & Figueroa) on back. Page 4 upper right corner in pencil reads "#87-1 00/".
