File:Otto Ludwig Rheingraf.jpg
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![File:Otto Ludwig Rheingraf.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Otto_Ludwig_Rheingraf.jpg/437px-Otto_Ludwig_Rheingraf.jpg?20140506120607)
Size of this preview: 437 × 599 pixels. Other resolutions: 175 × 240 pixels | 350 × 480 pixels | 864 × 1,184 pixels.
Original file (864 × 1,184 pixels, file size: 344 KB, MIME type: image/jpeg)