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Description: | An incomplete cast copper alloy Colchester derivative (Polden Hill type) brooch, of Roman dating (75 - 175 AD).Approximately 75% of the brooch is present consisting of the bow, wings and spring casing. The pin, foot and spring are missing.In plan, the brooch is almost T-shaped, and D-shaped in cross section. The bow head is hump-like, and angular (comma shaped) in profile, with cylindral wings projecting from either side at the top. A small rib is present at the junction between the bow and the wing caps. The front of the bow has been decorated by two parallel ridges running down the length of the bow. To either side of these ridges, is a column of small diagonal ridges. Each of the wings has a sub circular wing cap, with a perforation for the spring. The back of the brooch is plain and undecorated. A cylindral groove is present along the length of the back, between the two wings. Minor traces of silvering / tinning are present on the reverse of the brooch.The brooch measures 42.21 mm in length, 29.41 mm wide and 15.76 mm thick. It weighs 19.7 grams.The brooch is a mid to dark green colour, and has an even surface patina. Some of the original soil is still adhering to the surface of the brooch. The patina has flaked away from the surface of the brooch in a couple of areas, to leave a lighter green colour. These areas should be monitored for signs of active copper corrosion appearing (a bright green powdery residue). To reduce this risk, the brooch should be stored in a sealed air tight box, such as a tupperware tub, lined with silica gel and acid free tissue paper.Colchester derivatives (Polden Hill type) brooches are one of the most frequently encountered Roman brooch types, with examples being recorded from the majority of England and Wales. Examples of this brooch type are very commonly known from sites in the west of Britain. Hattatt (2004) illustrated several examples of this style of brooch on page 300, figure 159.Reference:Hattatt, R. (2000) A Visual Catalogue of Richard Hattatt's Ancient Brooches. Oxbow Books, Oxford.
Original Image | Publisher: | http://finds.org.uk | Source: | Portable Antiquities | Identifier: | http://finds.org.uk/database/artefacts/r... | Go to resource |
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