Silver, 40mm diameter, weight 32.07 grams.  INVESTITURE CAERNARVON CASTLE · CASTELL CAERNARFON around, Welsh dragon standing left, ARWISGIAD below.  Rv. HENRY OF MONMOUTH  HENRY V around, his bust right, 13 99 in field, C COLLEY to left.  Hall-marked and numbered 484 on edge.  Light colourful toning, slight surface marks, Good EF - Almost FDC

Henry V became Prince of Wales in 1399.