Manufacturer: Topcon
Model#: RL-H5A
Serial#: 1A 023038
Acquired: April 2021 (New)
Video: What is a Grade Stick For? (While not a Topcon laser, this video is a great demonstration of how the laser, measuring rod, and laser receiver are used to determine the relative heights of objects and surfaces on a job site.)
Video: How to Read a Grade Rod (Again, not a Topcon laser, but good instructions for reading a grade rod).