Edward VI. 1547-1553. AV Half Sovereign (4.85 gm, 9h). Second period, struck 1549. London Tower mint; mm: arrow. 

Crowned bust right.
Crowned coat-of-arms; E R flanking. 

Potter, Coinage 3a; Schneider 672; North 1911; SCBC 2438. 

Used by permission of CNG, www.cngcoins.com 
CNG 69, Lot: 2142. June 2005.