63mm. Unsigned.
Obverse with the motif of the Institute, armorial lions to either side of a column. Reverse showing Bricklayers at work with St Paul's Cathedral behind. Edge engraved 'Depot And Office, Kardov, Fforestfach, Swansea. Messrs Smith, Wilson And Cox, F/A/A.R.I.B.A'.
About Uncirculated and housed in fitted John Pinches case of issue.