File:Hall 1901 disc signal assembly.jpg
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Hall_1901_disc_signal_assembly.jpg (403 × 449 pixels, file size: 25 KB, MIME type: image/jpeg)
Captions
Captions
Hall 1901 disc signal assembly
Summary[edit]
| Description |
English: Hall 1901 disc signal assembly from the company catalog |
| Date | |
| Source | Hall Signal Company Catalog |
| Author | Unknown author |
Licensing[edit]
|
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:33, 28 April 2022 | | 403 × 449 (25 KB) | Doug Coldwell (talk | contribs) | Uploaded a work by unknown from Hall Signal Company Catalog with UploadWizard |
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