Kalibrier-Standards = Calibration standards / Hellma Worldwide.

Müllheim : Hellma GmbH & Co., 1993.

1 folded sheet (4 page) : illustrations (color) ; 30 cm + Price list (1 sheet ; 30 cm)

Cover title

Some copies have a sticker on the back cover: "Hellma (England) Limited, 23 Station Road, Westcliff-on-Sea, Essex" and have been distributed as advertising materials by the English branch of Hellma GmbH & Co.

Copy 1 Supplier/Donor: Hellma (England) Ltd