Watch List notes:

George II (1727-1760), 'Old Head' Shilling, 1750, '5 over 4', 'Wide 0', old laureate, draped and cuirassed bust left, rev. four crowned shields cruciform, seven strings to harp, obliquely milled edge, 5.99g, 6h (Bull 1732; ESC 1211; Spink 3704), rubbed and toned, almost very fine.
Provenance
Warwick & Warwick 876, 11 December 2019, lot 396
, ,
Bull 1732 suggests the 50 is over 47 or 46. Here it seems the 0 is over something, but it is not clear what.
Estimate: £50 - £80