These subs were built mostly out of the box from the old inaccurate molds. Therefore the quality of moulding is poor and inaccurate, with poor detail, and thick plastic. Some exception is model Sch - in the complete set there is a deck with seams, hatches and so on molded in. During assembly improvised materials were used. The deck gun and the bridge, sliding devices are made from scratch..The decals came from a set, flags and pendants from a decal from the firm Begemot.