Fig. 4: Portrait of a 39-Year-Old Woman.
From: Two Rembrandt portraits in focus: assessing a potential relationship

Locations of the aetatis inscription and the alleged signature, indicated by the rectangles on the left and right of the sitter, as seen from the viewer’s standpoint, respectively (a). Images of the aetatis inscription “ӔT ⋅ 39” (b and d), and of the signature and date (c and e); (b and c) correspond to the images revealed using high-contrast photography in 1966, and (d and e) to the ones resulting from the image processing carried out in 2024. In e, the signature remains poorly visible. In (f), the arrow points to the aetatis inscription as seen in a super-resolved detail of the Fe K distribution map generated using the Enhance feature in Adobe Camera Raw.