This pack of SMI surveying card overlays is designed for use with HP 48 series calculators, including 48S, 48SX, 48G, and 48GX models.
The pack includes three replacement overlays, which are available in white, transparent, Survey GX, Survey Pro, and SMI Surveying options.
These overlays are designed to be used in conjunction with SMI surveying cards, and are sold separately from the calc…

This is a historical resource from 1898 called "The Transit," which was a publication of The University of Iowa College of Engineering.
It contains a surveying volume with interesting ads and was edited by undergraduate students. The item is in excellent condition, but there is a tear on one page.
The photographs provided are clear and accurate, and potential buyers are encouraged to view…