| Source: Hodiamont Notes, January-March 1906 Location: St.L. / 05 / H66 | |
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| Corporate Name: | Erker Bros. Optical Company |
| Address: | 608 Olive St. |
| Advertisement: | yes |
| Volume: | 1 |
| Issue: | 1 |
| Date of Publication: | January 15, 1906 |
| Page: | 12 |
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