Glass bottle of "Choleflavin" brand (papaverine hydrochloride) pearl pellets in original carton. Carton: 73 mm x 44mm x 28 mm. Yellow carton with maroon borders and blue central text pabel reads, ' 60 pellets/ CHOLEFLAVIN/ Trademark Brand/ Trypaverin/ Bayer Products Ltd./...' The carton contains an oval shaped clear glass bottle with a shiny metalic top which is embossed with the Bayer logo. On the front of the bottle is adhered a printed label, again in yellow and blue, which repeats the information on the front of the carton. The 'pellets' contained within the bottle are spherical and silver in colour. Supplied by Bayer Products Ltd., German, 1930-1940.