| Reference Number: Avaluer:104992 | Maker: James L. Robertson & Sons |
Vintage Improved Willis Planimeter By James L. Robertson & Sons
Antique 1901 Improved Willis Planimeter With Case By James L. Robertson & Sons
Antique Improved Willis Planimeter W/case - 1901 - Mfg James L. Robertson & Sons
Improved Willis Planimeter, With Instructions, S/n 6061
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