Luxembourg 1970 - 100 Francs Archival Gridlines Calibration Specimen Serial D170001 (Pick 56s)
Across the full surface, original blue registration gridlines remain visible. These were applied during pre-production calibration to verify positional alignment, spacing, and structural balance of all design elements prior to final output. Such grid systems were strictly functional and normally absent from finished material, making surviving examples direct physical evidence of press preparation and quality control procedures. Read more →