Dating is approximate based on stylistic elements—note similarity to 24.104 and 21.064. No watermarks visible under transmitted light, but bits of green and red paint on the sheet verso suggest offset from the still-wet sheets stacked during production. Note the boundaries of the red keyblock impression along all four edges, while the green fill impression trails off the sheet edge—the pattern seems intended for tiling, possibly even as a wallpaper, though the actual blocks don’t quite line up on this sheet.