Marine Chronometers

Evaluations.

Wooden box, with double lid, the first one with glass designed to watch the watch avoiding manipulation, which can be opened with just a push button located on the front, the second lid designed to be able to manipulate the Marine Chronometer can only be unlocked with a key normally only in the possession of the ship's captain. Said box is equipped with a gimbal suspension, which was invented by Giorlamo Cardan (1501-1576), which keeps an object in a horizontal position, whatever the support position. The gimbal suspension consists of two independent rings, which can rotate around their respective axes. The stopwatch is attached to the inner ring, while the outer ring is attached to the inside of the wooden box. These rings are made of brass and finished with a shellac varnish to protect them from environmental factors. During the restoration, we could see how said layer of varnish had deteriorated considerably, causing the brass to begin the oxidation process. The action carried out was the cleaning and treatment of the brass to stop the degradation, and recovering the original shellac varnish, giving the object the original appearance of its construction. On the front of the case there are two ivory plaques with inscriptions. On the first, rectangular, you can read the name of the manufacturer: "ANDr HOHWÜ AMNSTERDAM" and the second, circular, the production number of the Chronometer: "545". On the sides two handles made of brass which serve to transport it. The 240X240X18mm case houses Andreas Hohwü's Marine Chronometer movement inside a 130mm diameter brass bowl.

Sphere

Typical English-style Marina chronometer dial, with dimensions of 122mm in diameter and produced from brass and finished with silver powder. In it we observe a typical arrangement, hourly numbers on the outer circumference in Roman format, a sub-dial located at 18 o'clock, for the seconds with inscription of Arabic numerals and another sub-dial with a much smaller diameter located at 12 o'clock where The power reserve is indicated, which is 56 hours. In the center and horizontally, the manufacturer's inscriptions can be seen: "ANDr HOHWÜ AMSTERDAM" and the manufacturing number "545". Said sphere had a dirty and oxidized appearance, in this case with black tones due to the oxidation of the silver. Although the appearance was not very pretty, we were able to carry out an anti-rust treatment of the superficial silver and its subsequent cleaning, giving it the original manufacturing appearance. The dial is accompanied by four hands, two central ones that indicate the hours and minutes, made of 14-carat gold to avoid magnetism and in the "Poir Stuart" style, followed by the other two hands, one placed in the sub-dial of the hands. 18 hours which indicates the seconds, it is a "grande second poire" style hand following the style of the two main hands and with compensated weight, made of blue steel. The fourth and last one located on the 12 o'clock dial indicates the power reserve, as it is a slow travel hand it is not compensated, made of blue steel and straight style

Movement

Although the movement is made by a German watchmaker and manufactured in Amsterdam, it has a 100% English architectural structure, very surely Adreas Hohwü used English "ebauches" like most of the builders of Marine Chronometers of the time, to later finish their mechanisms. Movement of two plates assembled between them with four columns that are fixed to the base plate. Made of quality brass and steel, the main plate and the bridge are decorated with a light "perlage". Ruby chatons and ruby ??counter pins are located at the escape wheel and balance wheel position to reduce friction and keep the oil in the best possible condition. As is normal in these movements, the shooting structure is as simple as possible so as not to waste useless energy, with a barrel and fuse system with a constant force winding system so as not to lose energy when winding the chronometer. With a power reserve of 56 hours. The function of the "fusee" is to equalize the force transmitted to the taxiing during the 56 hours of running. With a typical running design for a frequency of 14,400 vibrations per hour, the movement is equipped with a "Detent" escapement, directly driven by the balance. The exhaust to Detent is of the English type. This escapement version for Marina Chronometers is attributed to John Arnold, an English watchmaker who developed chronometers for a less expensive manufacture than John Harrison, inventor of Marina chronometers, robust and very precise. Andreas Hohwü's Detent exhaust drives a split bimetal balance with variable inertia via two adjusting screws. This balance vibrates thanks to a cylindrical hairspring in blued steel with a double final curve for better concentric development.

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666666 onsequuntur inventore voluptates consequatur aut vel et. Eos doloribus expedita. Sapiente atque consequatur minima nihil quae aspernatur quo suscipit voluptatem.

Laborum omnis voluptates voluptas qui sit aliquam blanditiis. Sapiente minima commodi dolorum non eveniet magni quaerat nemo et.

Non quod totam minus repellendus autem sint velit. Rerum debitis facere soluta tenetur. Iure molestiae assumenda sunt qui inventore eligendi voluptates nisi at. Dolorem quo tempora. Quia et perferendis.

Eius alias aut cupiditate. Dolor voluptates animi ut blanditiis quos nam. Magnam officia aut ut alias quo explicabo ullam esse. Sunt magnam et dolorem eaque magnam odit enim quaerat. Vero error error voluptatem eum.