1Watermark
Raking light · the light at this pointThe mark hardly stands out. At most a faint change of shadow where there are fewer fibres.
Transmitted light · the light at this pointThe outline brightens: fewer fibres remained above the mould wire, so the paper is thinner there and lets more light through.
Stage 2, mould. Water drains through the mould wires, and the wire pattern holds back fewer fibres.
The outline corresponds to a wire pattern on the screen or mould. It can be compared with the description of how the sheet is formed.
A watermark also occurs in machine-made paper (a claim carried over from V2, to be verified), so on its own it does not prove hand papermaking. It does not point to Ławszowa: this compilation has no mark design assigned to that place. The mark on the model is a demonstration.