File:Alvan Clark 4 Inch Refractor Engraving.jpg
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Summary
| Description |
English: This engraving, found on the back of an Alvan Clark 4 inch refractor, gives the date of manufacture (1882) and factory location in Cambridgeport, Massachusetts. Taken with permission at Rockford University. |
| Date | |
| Source | Own work |
| Author | Blablabliam |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:57, 21 January 2022 | | 3,024 × 4,032 (2.97 MB) | Blablabliam | Uploaded own work with UploadWizard |
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