Watch List notes:

Principaute de Monaco, 50 centimes, 1920, serial number A 34135, dark grey on white, crowned coat of arms at low centre, Prince's Palace of Monaco at centre, ornate columns at left and right, reverse, floral garlands,, (Pick 3a, TBB B102), in PMG holder 55 EPQ About Uncirculated.

Estimate: £100 - £120