Magnifying device for use with a triangular rule
Mason's scale and masonry guide employing said scale
Measurement device
Measurement device and method of use with curves
Measurement device with British/metric scales
Measuring and drawing instrument
Measuring and instructional ruler
Measuring and instructional ruler
Measuring and instructional ruler device
Measuring and leveling device and method of using same
Measuring device
Measuring device
Measuring device for teaching incremental measurements
Measuring device for topographical maps
Measuring instrument
Measuring instrument and method of making same
Measuring ruler