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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich |
| Serial Number: | 13763 |
| Type: | No. 35/I |
| Year: | 1909 |
| Size: | 23 x 8.5 x 4.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich |
| Serial Number: | 13027 |
| Type: | No. 36/II |
| Year: | 1909 |
| Size: | 25 x 9 x 4.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich |
| Serial Number: | 13872 |
| Type: | No. 37/III |
| Year: | 1909 |
| Size: | 25 x 9 x 4.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich |
| Serial Number: | 22790 |
| Type: | No. 37/III a |
| Year: | 1914 |
| Size: | 25 x 9 x 4.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich |
| Serial Number: | 34498 |
| Type: | No. 37/III L |
| Year: | 1932 |
| Size: | 26.5 x 9.5 x 5.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich / Eugene Dietzgen Co. N.Y.-CHGO. |
| Serial Number: | 36673 |
| Type: | 1803D |
| Year: | 1941 |
| Size: | 23 x 7 x 4.5 cm |
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Compensating Polar Planimeter
| Marking: | G. Coradi Zürich Switzerland |
| Serial Number: | 50343 |
| Type: | 37aa/III |
| Year: | 1960 |
| Size: | 26.5 x 9.5 x 4.5 cm |
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Checking Disk for Planimeters with Magnifying Lens
| Marking: | G. Coradi Zürich |
| Serial Number: | - |
| Year: | ca. 1935 |
| Size: | 7.6 cm (Diameter) |
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Checking Disk for Planimeters with Magnifying Lens
| Marking: | G. Coradi Zürich |
| Serial Number: | - |
| Year: | ca. 1935 |
| Size: | 9.6 cm (Diameter) |
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