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