Date transcribed from photograph. Inscription on frame, verso: Dredge "Duwamish"-Testing the Main Pump.
33.78 x 27.6 cm
Master image scanned on Epson 10000 XL flatbed at 600 pixels per inch, 24 bit color, saved as TIFF file. Photoshop used to resize images to 300 ppi and convert to JPEG format. Master image file size: 156,045,543 bytes.