File:712 dolphin brooch back (FindID 111390).jpg

English: Cast copper alloy dolphin hill brooch with a spring mechanism, semicircular, concave cross-section wings that have a double recessed line on the forward edge. On the reverse of the wings there is a knop in the top centre, this is all that remains of the spring and pin. On the top of the head of the bow is a loop that secures the external chord of the spring. There is a double linear groove that run from the top of the head and down the length of the bow. The leg is broken halfway down, resulting in the catch plate missing. The artefact is in fair condition with most of the original patina remaining, which is mid green. The extremities are slightly corroded resulting in a pitted surface, all break are old. Overall dimensions are length 21mm, width 25mm, thickness 8mm, weight 14.05g. These are dated to 43-100AD.