A late 17th / early 18th century Channel Islands silver Trefid spoon

A late 17th / early 18th century Channel Islands silver Trefid spoon, maker's mark IA, unknown, Jersey, circa 1700, the reverse of the terminal scratch initialled 'IEMR', length 19.1cm, approx. weight 1.5oz. For and illustration of the mark see Richard Mayne, Channel Islands Silver, Phillimore and Co 1983, page 23.