{"product_id":"holland-circle-by-baumann-and-kinzelbach","title":"Holland Circle by Baumann and Kinzelbach","description":"This intriguing item is almost certainly a Holland Circle by German scientific instrument makers Baumann \u0026amp; Kinzelbach. The Holland Circle, sometimes referred to as a Dutch Circle, was used in land surveying and is a precursor to the theodolite, an optical instrument for measuring angles. Baumann and Kinzelbach were based in Stuttgart, Germany, and in addition to crafting surveying instruments and compasses, also created a 2-foot tall \"comet seeker\" used at the Gotha Observatory near Gotha, Thuringia, Germany. Crafted from bronze with a handsome wooden stand and complete with its custom carrying case, this finely-calibrated instrument is a unique and elegant piece of scientific history. \u003cbr\u003e\u003cbr\u003e Engraved \"Baumann \u0026amp; Kinzelbach Stuttgardt\" \u003cbr\u003e\u003cbr\u003e Circa 1820 \u003cbr\u003e\u003cbr\u003e 16 3\/4” high x 8 1\/8” wide x 8 1\/8” deep\u003cbr\u003e Case: 7\/8\" high x 9 1\/4\" wide x 11 1\/2\" deep \u003cbr\u003e\u003cbr\u003e References:\u003cbr\u003e \u003cem\u003eGotha- the Instruments of the observatory\u003c\/em\u003e, 1988, by G. Wolfschmidt, pp. 89-90","brand":"M.S. Rau","offers":[{"title":"Default Title","offer_id":51805220897090,"sku":null,"price":6850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/5376\/6978\/files\/31-3790_1_bada6957-a2f4-451e-a9ef-f4fbdbf05ea9.png?v=1768106704","url":"https:\/\/www.bullvendors19.com\/ar\/products\/holland-circle-by-baumann-and-kinzelbach","provider":"Bull Vendors 19","version":"1.0","type":"link"}