Lesson No. 1 originally was released in 1980 as the first record on the influential 99 Records. The image above shows the CD cover of the 2004 re-release. The brownish tint of the vinyl sleeve photo below might be due to bad lighting.
Most digitally available versions carry the name Buxom, which goes back to an adaptation (or “Facsimile Font original”) made by Robert Trogman for FotoStar International in 1975, based on work by lettering artist Herman Spinadel [Bob Trogman]. Besides the Buxoms, various other digitizations exist, including Bustle (FontBank Inc., 1990–1992; Novel), Chocolate (Arts & Letters, 1995; Brendel), Lee Caps (David Rakowski, 1990). The only other one of note is Keepon Truckin NF by Nick Curtis, who gives credit to Milton Glaser.
The versions vary, most notably in the line width, the design of non-alphabetic characters, and in character set. None of the digital fonts feature the hatched shades for round-bottomed characters that are present in Glaser’s original. A comment by Alexander Tochilovsky suggests there was a lowercase, too, which is included in Photo-Lettering’s One Line Manual of Styles (1971).