Southwest Boat Corporation.Two “GM Deisal Power” engines side by side inside ship. Ceiling seen above through opening. Hanging light inside; 2 hoses coming down from above right. Ballard Neg. #5500-24 The Charles Butt Collection
W. H. Ballard, “Progress Photos,” Mount Desert Island Historical Society, accessed May 9, 2024, https://mdihs.digitalarchive.us/items/show/6461.Item 6827
