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Buying nautical and measurnig instruments on eBay should be fun and easy. Whether you are looking for brunton compass, sundial compass, telescope, magnifier, theodolite or something else, there is always a lot of items on offer on auction sites on internet. To make sure that the desired item is exactly what you are looking for, always make sure that you do a research and familiarize yourself with desired item's functions and main parts. Also, keep asking seller questions about as many details as possible. These days most of brass and glass measuring instruments are made in India, however, even that can vary. If , for example, item is made in commercial hubs like Delhi or Mumbai, it is usually of lower quality than items made in traditional industrial areas like Moradabad. Only experienced sellers that are actually involved with manufacturer can answer these questions and that will in many cases help buyers to avoid buying a low quality, non operational item. Always make sure that you ask questions about the material used for casens, if it is cast and mashined brass versus stamped brass sheets, if holders are made of leather as opposed to synthetic. Always keep in mind to ask seller a lot of questions.