4 photographs of Dunn slip elevator with links, Southern California, 1929. "Subject: Dunn Slip elevator with links at Wilson-Willards; Agency: McCarty Co.; Client: Byron Jackson at Wilson-Willard; Original print order: 1 ea[ch]; Size: 11x14, 5x7, 8x10; Finish: gl[ossy]; Re-order: 1 ea[ch], #1, 3, 4 - 1 ea[ch]" -- on envelope front. "Operator's report: Joe; Original photographs: 3; Size: 11x14; 1, 11x14; Ounces of flash powder: 1; Hours: 2; Amount: 3.75, 1.25, .85, 3.00; Extra charges: Barnes" -- on envelope back.