| Time Period Manufactured | Pre-1930 |
|---|---|
| Maker | Gurley |
Check the listing for details. 1892 Gurley Surveying & Drafting Insts. Catalog. Listed at 75.00 USD. I am not a book dealer so not familiar if there is a grading standard, just going by common sense. This has more survey insts. illustrated than any of the other catalogs. Burt's solar compass. Gurley's original Solar Compass was similar to Burt's improved solar compass.