Item 12073 - Pressure retort, Portland Company, ca. 1920 Item 12073 - Pressure retort, Portland Company, ca. 1920 Contributed by Maine Historical Society Item 12073 Zoom 4381px x 2956px - 14.6"w x 9.9"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society Image Info A square closed pressure retort vessel on a hand sled, probably shown at the Portland Company, the company that would have crafted this retort. Show Details