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Polar Disc Planimeter
| Marking: | K. Hünenberger |
| | Altstetten Switzerland |
| Serial Number: | 363 |
| Year: | ca. 1932 |
| Size: | 38 x 24 x 8 cm |
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Polar Disc Planimeter
| Marking: | K. Hünenberger Zürich-Altstetten |
| Serial Number: | 472 |
| Type: | Nr. 11a |
| Year: | ca. 1935 |
| Size: | 41.5 x 24.5 x 9 cm |
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Rolling Disc Planimeter
| Marking: | K. Hünenberger Zürich |
| Serial Number: | 492 |
| Type: | Nr. 13 |
| Year: | ca. 1935 |
| Size: | 40 x 30 x 13.5 cm |
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Polar Planimeter
| Marking: | K. Hünenberger Zürich 9 Altstetten |
| Serial Number:: | 510 |
| Type: | Type III, No. 10a |
| Year: | ca. 1935 |
| Size: | 25.5 x 9.5 x 4 cm |
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Polar Planimeter
| Marking: | K. Hünenberger Altstetten/Zürich |
| Serial Number: | 703 |
| Type: | Type II, No. 9 |
| Year: | ca. 1940 |
| Size: | 25 x 9 x 4.5 cm |
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