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Drafting Set
| Marking: | Kern in Aarau |
| Year: | ca. 1850 |
| Size: | 28 x 12 x 3 cm |
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Drafting Set
| Marking: | (no Marking) |
| Year: | ca. 1860 |
| Size: | 34 x 14 x 2.5 cm |
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Drafting Set
| Marking: | I. Kern à Aarau en Suisse |
| Year: | ca. 1865 |
| Size: | 29.5 x 16.5 x 4 cm |
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Drafting Set
| Marking: | I. Kern à Aarau en Suisse |
| Year: | ca. 1870 |
| Size: | 24 x 11.5 x 3 cm |
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Drafting Set
| Marking: | I. Kern à Aarau en Suisse |
| Year: | ca. 1870 |
| Size: | 26.5 x 14 x 3 cm |
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Spring Bow Compass
| Marking: | I. Kern à Aarau en Suisse |
| Year: | ca. 1870 |
| Size: | 11 x 5 x 2 cm |
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Caliper
| Marking: | I. Kern à Aarau en Suisse |
| Year: | ca. 1880 |
| Size: | 24.5 x 9 x 2.5 cm |
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