DOXA 50th Anniversary Knife: This knife was designed to accompany the 50th anniversary of the DOXA SUB300 with Aqua Lung. The original knife, “The Argonaut” was designed with the US Navy Seals.

Aqua Lung 75th Anniversary Knife: This knife was designed in tandem with the DOXA 50th Anniversary Knife. It was only made available with the Aqua Lung 75th Anniversary book.