1.25" complete with lightly tanned backpaper which has name of maker Spencer of Philadelphia. Also paper has large text promoting radio program "Listen To Brother Bill Every Day Six P.M./WIP." Collet has surface oxidation but causes no problem. Front red background has small age stain but blending with the dark red color so noticeable only on the closest inspection. Button design is perfectly centered with full gloss and deep unfaded color. Our Auction #202 Mint example realized almost $700.00.