Massive marine compass company "A. Sperling" in St. PETERSBURG in wooden case

the Russian Empire, the end of XIX century Brass, steel, wood. Excellent collectors condition, the only negative – the lost fragment of the lid of the box (can be restored free of charge). The external diameter of the compass of about 25 cm In the kit hinge fastening. In such completeness Russian marine compasses almost not found. A great rarity.

Historical note: A. Sperling, physico-mechanic Military schools, worked in SPb in 1830-40-ies. 1811 opened a mechanical workshop that produced geophysical and topographic tools, which in 1821 was greatly expanded and renamed to the Mechanical school of the General staff and later on came in the composition of the Military topographical depot. In 1822 if the Main headquarters established the Corps of Military topographers, in the year it has openly Military topographic school. In 1837, the Department of state property, which, along with the land survey Department organized a shooting state lands, was converted to the Ministry. In the Department of agriculture this Ministry included the Corps of foresters and Body of civil surveyors, later renamed to the Corps of mejevschikov. «Physico-mechanic" military schools Sperling manufactured surveying instruments of high quality and for Surveyors ' corps: theodolites, levels have varied designs, including the number of the pocket, manzoli, ecometry, drawing instruments, made ackery, astrolabe, it is noteworthy «with all the required parts listed in such a uniform shape that every single part of her match itself part in all the other astrolabes". In this remark reveals the desire of sperlinga to the universality is not only tools, but and their details. After the death of the master work was continued by the heirs. Firm «A. sperlinga" existed until the beginning of the twentieth century.

Excellent collectible condition, the only negative is the lost fragment of the lid of the case (can restore free).

A. Sperling, physico-mechanic of Military educational institutions, worked in St. Petersburg in 1830-40-ies. In 1811, opened a mechanical workshop that produced geophysical and topographic tools, which in 1821 was greatly expanded and renamed the Mechanical school of the General staff and later became part of the Military topographical depot. In 1822, the General staff established the Corps of Military topographers, in the same year when it opened the Military-topographic College. In 1837 the Department of state property, which along with the land survey Department organized a shooting state lands, was reorganized into the Ministry. To the Department of agriculture this Ministry included the Corps of foresters and the civil topographers Corps, later renamed as Housing maristov. "Physico-mechanical" military schools Sperling produced surveying instruments and Surveying for buildings: theodolites, levels have a variety of designs, including handheld, manzoli, ecometry, drawing instruments, made eckery, the astrolabe, notably "with all the necessary spare parts provided in a unified form such that every separate part of it corresponded to the same parts in all the astrolabes". This observation reveals the desire of sperlinga for the universality of not only tools, but also their details. After the master's death work was continued by the heirs. Firm "A. sperlinga" lasted until the early twentieth century.