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Estes - Astron Altiscope Accessory
| Manufacturer: | Estes  |
| Model: | 1415 |
| Product Type: | Accessory |
| Production Years: | ?-? |
| Status: | Out-Of-Production |
External Links
Patent US3208147 - Inclinometer - Google Patents
Vernon Estes's patent on the Astron Altiscope.
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