| Source: Souvenir Program of the 50th Anniversary of the St. Louis Photo-Engravers' Union No. 10, 1898-1948 Location: Labor Collection, Box 1, Archives | |
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| Last Name: | Wachter |
| First Name: | Rudy |
| Middle Name: | J. |
| Page: | 26-27 |
| Remarks: | signature of; with Color-Ad Engraving Co. |
