DescriptionDeZeng's Phoro-Optometer of 1917.jpg English: DeZeng's Phoro-Optometer of 1917. DeZeng Standard Co., Camden, NJ Date 1917 Source "The Modern...
DescriptionDeZeng's Phoro-Optometer of 1917 with wall mount.jpg English: Dezeng's Phoro-Optometer of 1917, with wall mount Date 1917 Source "The Modern...
I, the copyright holder of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution-Share...
I, the copyright holder of this work, hereby publish it under the following license: This file is licensed under the Creative Commons Attribution-Share...
