Magnetic Locators Manuals.
Schonstedt Manuals

Manual Schonstedt - REX
https://www.schonstedt.com/wp-content/uploads/Rex_Manual_SN-363164-and-below.pdf

Manual - Schonstedt Spot Magnetic Locator
https://www.schonstedt.com/wp-content/uploads/Spot-Manual.pdf

Manual - GA 52 Magnetic Locator
https://www.schonstedt.com/wp-content/uploads/2014/04/GA-52_Manual.pdf