A “basic bench mark” set in the top of a stone pillar outside the U. S. C.& G.S. headquarters.
Photo Location: Washington, D.C.
Photo Date: 1930
| 640 x 465 | 53.43 KB | |
| 1280 x 930 | 189.55 KB | |
| 1920 x 1394 | 402.98 KB | |
| 1967 x 1428 | 546.94 KB |
| Added On | 16th October 2015 |
| Viewed | 6 viewed |