Yep welcome Herman. That SIB (as we'd call it not having a GRP outer hull) is unusual but Google found me loads of images and web pages where it is mentioned but not always in English.
It's on the page marked 416 (oddly it starts at page 412) of this electronic brochure... Luftmatratzen von KK Kunz und Hages
Spec I've translated from a data sheet...
Sevymarine SV10 inflatable boat , manufactured by Zodiac in France. CE- category C ( up to 6 Beaufort wind and waves up to 2 m ).
Floor boards are wooden and alloy. Two main air chambers plus keel.
Length 3.05 m, width 1.5 m
Outboard 10hp maximum
Specially reinforced polyester material (not PVC)