Hemra (Fisheries) Helmet: Serial number 4025, Circa mid to late 1930's.Published in:Journal of Diving History, 2017, v. 25, n. 93, p. 44By:Leaney, LesliePublication type:Article
HELMET AUCTIONS.Published in:Journal of Diving History, 2013, v. 21, n. 3, p. 52By:Leaney, LesliePublication type:Article