Crown on letter M on ? plinth

Crown on letter M on ? plinth
Watermark: Crown on letter M on ? plinth
Measurements: 40mm x 20mm (approx.)

 

between chain-lines 2 and 3

Process: Canon EOS, backlighting; Photoshop
Source: Tiomna Nuadh ar dTighearna (Dublin 1602) f. 119
Repository: Royal Irish Academy, Dublin