1955 United Kingdom - Farthing
The 1955 UK farthing obverse features the laureate bust of the young Queen Elizabeth II facing left, with the surrounding legend: '+ELIZABETH-II-DEI-GRATIA-REGINA-F:D:'
The reverse shows a wren, (a small native bird of Europe - Eurasian Wren), facing left. The date is above the main design, and the word 'FARTHING' below.
A diameter of 20mm, and a weight of 2.75 to 2.9 g.