THE SERIOUS COW - Large lithographed sheet circa 1925-30 - 50 cm diameter. Misses, a scratch at the corner of an eye, wear to report, stains . Fromageries Grosjean Frères was founded in Lons-le-Saunier (Jura) in 1901 by Octave Grojean. From 1921, the GROSJEAN cheese dairies manufactured and sold Gruyère cream known as VACHE SÉRIEUSE. In 1970, GROSJEAN was bought by Nestlé, then Besnier, then the Lactalis group (source: camembert-museum.com).