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Check the listing for details. William Young -- Vernier Surveyor's Plain Compass -- 1846-1853. Condition: Used. Listed at 1200.00 USD. William Young -- Vernier Surveyor's Plain Compass -- 1846-1853. Wm. J. Young Surveyor's Vernier Compass - Philadelphia, from the 1800's. In 1830, William J. Young applied for a patent on an improved surveying compass designed to measure horizontal angles with or without reference to magnetic north. After the expiration of Young's patent, this compass was referred to as a "Railroad Compass". 19thC.It only has one of the arms in pic three.

$600.00
$1,200.00