Brass graphometer signed Petrus Jermanini f. Mutinae made circa 1740/1750

Brass graphometer signed Petrus Jermanini f. Mutinae made circa 1740/1750



Graphometer: length 19.5 cm x height 12.8 cm




Petrus Jermanini f. Mutinae

Country of manufacture


Category: Scientific


Brass graphometer signed “Petrus Jermanini f. Mutinae“.

It features an openwork main plate engraved with three scales: the first from 0 to 180 degrees, the second from 180 to 0 degrees and the third a non-linear scale graduated 0-100-0-100-0.

The vertical arm of the turntable is engraved with a cartouche bearing the signature surmounted by a grotesque. At each end of the scales are Renaissance decorations: a grotesque head with ammonite-shaped ears, surmounted by a leafy branch, and a beautifully carved sight. In the lower part of the main plate, in the center, is a compass with a silvered base engraved with an 8-direction compass rose, topped by a blued steel needle with brass pivot, all covered with glass. Around the compass swivels a mobile arm with two sights for reading the graduations on the main plate.

On the back is the ball-and-socket joint, set into its support tube with its clamping screw.

In its original wooden case covered with stamped black leather. The interior is covered with a faded red chamois.

Nota : rare signature for scientific instruments


– Graphometer: length 19.5 cm x height 12.8 cm

– Box: length 22.5 cm x width 13.5 cm x height 9 cm

Datable circa 1740/1750.

Ask the Dealer

Item enquiry

To enquire about this item, complete the form bellow to send a message to the Dealer

Enter Email
Confirm Email

Dealer information

FR Galerie Delalande Paris

After 37 years in Le Louvre des Antiquaires, the Delalande gallery moved early June 2015 to 35 rue de Lille, 75007 Paris, on the other side of the Seine River in the well known antic shops area "le Carré Rive Gauche".
Our main specialties are, since 1976, Marine and Scientific instruments, Tobacco and Opium objects, Curiosities and Great Canes.
We participate to international antique fairs (TEFAF Maastricht) and are unique partner of the French Maritime Museum.
Eric Delalande is also Administrator of the French Experts National Company (C.N.E.).
Please visit also our two websites, which are frequently updated: (French) and (English). ----------------------------

La Galerie Delalande s'est installée en juin 2015 au 35 rue de Lille (75007 Paris), au coeur de la capitale dans le "Carré Rive Gauche", après 37 années de présence au Louvre des Antiquaires.
Nous nous sommes orientés, depuis 1976, vers plusieurs spécialités : Marine et Sciences, Objets du tabac et de l'Opium, Cannes de collection et Curiosités.
Nous participons à des salons d'envergure internationale (TEFAF Maastricht) et sommes partenaires exclusifs du Musée National de la Marine.
Eric Delalande est également Administrateur de la Compagnie Nationale des Experts (C.N.E.).
N'hésitez pas à visiter nos deux sites internet fréquemment mis à jour : (Français) and (Anglais).

Shipping information
Payment methods
Terms & conditions