. English: The 'torretta butoscopica' (exploration turret), designed, built, assembled and tested by the Italian diver Alberto Gianni (right). Scanned from the book Viaggi nel mondo sommerso (Travel in the underwater world) by Ulderico Tegani, Mondadori, 1931. 1931. Unknown 4 Alberto gianni

Size: 1957px × 2554px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

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