1950s Aqua Survey Instruments Portable surveyor Compass in original case

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1950s Aqua Survey Instruments Portable surveyor Compass in original case:
$100.00

Finding metal markers and pipes is made moredifficult in that over time some get hiddenby weeds, or covered by dirt. In order to make findingthem easier a number of products were developed, the Aqua Locator isone of them. This product is not a \"water witching\" device butrather a magnetic dip needle that\'s optimized for locating ferrousmetal in the ground, like a marker or pipe, but can be used for findingany ferrous metal that\'s relatively near the surface. It\'s acompass that works on the up-down part of the field (which is strongerthan the horizontal field in most of North America).When the instrument is turned face up it acts like a conventionalazimuth compass, except the window only displays the cardinaldirections NW - N - NE, but by turning the case you can get the Red endof the needle to point North. Then the Aqua Locator is held a fewinches off the ground using the carry strap and is oriented with theNorth arrow on the case pointing North.Now maintaining the North direction slowly move the locator over thearea where ferrous metal might be located and look down at the image ofthe needle in the 45 degree mirror. When over ferrous metal theneedle will move to a vertical position.Instrument is clean in original leather case, there are some minor signs of wear from use. See images for details.