Winegrower's Art: Velte Iron, Forged Slider, Engraved, Early 19th Century: Something Rare

Rare object, this measure of wrought iron, (barrel or barrel gauge), 1m.32, rectangular section, forged ring on top, an iron slider, forged, tools worked and wedged by butterfly screw can freely browse the ruler. Datable from early 19th century, it has two different graduations, from 1 to 100 and from 10 to 100, depending on the direction marked by the tab. To understand the graduations, angular measurements which are not equidistant, refer to the interesting article: http://forezhistoire.free.fr/images/Therrat-VDF-89-90.pdf, specialized in the Velts, which explains the difficulty of angular measurements. Thank you, Mr. Therrat; Craft object, technical object, primitive object, rare.
Dimensions: 132cm x 4cm.
Good condition, as clearly visible in our photos....This item is for immediate purchase, payable by credit card or paypal. - eclectic - antique dealers since 1970, Siret: FR 24.430113233. Invoice and Certificate are attached to each of our shipments.