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Polar Planimeter
| Marking: | J. Amsler |
| Serial Number: | 76977 |
| Type: | 2 |
| Year: | ca. 1930 |
| Size: | 22 x 5 x 4 cm |
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Polar Planimeter
| Marking: | J. Amsler |
| Serial Number: | 77963 |
| Type: | 4 (extra large) |
| Year: | ca. 1931 |
| Size: | 52.5 x 6 x 4 cm |
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Polar Planimeter
| Marking: | J. Amsler |
| Serial Number: | 81964 |
| Type: | 6 (standard size) |
| Year: | ca. 1939 |
| Size: | 30.5 x 6 x 4 cm |
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Polar Planimeter
| Marking: | J. Amsler |
| Serial Number: | 72550 |
| Type: | 6 (small size) |
| Year: | ca. 1927 |
| Size: | 25.5 x 5.5 x 4 cm |
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Polar Planimeter
| Marking: | - |
| Serial Number: | 60452 |
| Type: | 7 |
| Year: | ca. 1918 |
| Size: | 42 x 7 x 5 cm |
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Polar Disc Planimeter
| Marking: | - |
| Serial Number: | 39039 |
| Type: | 8 |
| Year: | ca. 1905 |
| Size: | 38 x 18 x 10 cm |
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Compensating Planimeter
| Marking: | J. Amsler |
| Serial Number: | 65768 |
| Type: | 11 |
| Year: | ca. 1923 |
| Size: | 34 x 7 x 4.5 cm |
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