This generation of ADS suits was more or less a variation of the equipment produced previously. The shape of the suit was more streamlined due to an improved production method of the trunk. The suit was still composed of the upper and lower torso, separated at the waist by a bolted flange seal, like in the earlier model. Latter types have a more rounded head with the buoyancy tank on the dorsal area. The arms and legs were still assembled with three ball and socket joints each. To avoid fouling of the diver by the unprotected air tanks, and their accompanying piping, the tanks and cylinders were covered. The history is unclear as to when the shape modification of the upper torso took place.

Incidental to this chronology is that in November 1925 the German diver Otto Kraft established a record with a Neufeldt and Kuhnke armoured suit during a working dive to a depth of 75 meters (230 feet). This dive was undertaken to search for the British submarine M-1, sunk after a collision with a Swedish steamship. It is unknown if he used a suit of the first or second generation.