CAM-F600D1: Incomplete Roman bow brooch

Rights Holder: Cambridgeshire County Council
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BROOCH

Unique ID: CAM-F600D1

Object type certainty: Certain
Workflow status: Published Find published

An incomplete copper-alloy Roman Colchester derivatve brooch (also known as hinged Dolphin type). One of the wings and the pin are completely absent. The surviving wing has a length of 12.5mm and is cylindrical with a diameter, close to the bow, of 5.4mm tapering to 4.5mm at the end. A circular void is present through the wing that would originally have held a pin bar. This void has a diameter of 1.4mm at the inner end though seems slightly larger at the tip of the wing. This void is now filled with dried mud and or corrosion product. A shallow groove is present along the length of the wing on the upper and lower surface. This creates the subtle suggestion of a cylinder being held within curved 'C' shaped wings. The front surface of the wing is decorated with a single diagonal groove. This groove runs from the top edge of the wing near the bow, down and out towards the tip of the wing on the lower edge. The groove stops c.3.3mm before the tip of the wing however it should be noted that the wing tip is slightly worn. A pin slot would originally have been present between the surviving and now lost wings. It is not possible to determine the width of the slot however an estimated 1.7mm is suggested due to the ridge at the centre of the top of the bow. The upper edge of the bow is pointed giving a diagonal angle that is roughly parallel to the decorative groove on the surviving wing. The bow has a sub-triangular cross-section, the reverse surface being flattened. A ridge runs longitudinally down the centre of the front surface of the bow. At the top of the bow this ridge has a width of 1.7mm. As the wing stops at the edge of the bow's central ridge it is likely that the now missing wing also stopped at the other side of the bow's ridge.

At the top of the bow it has a maximum width of 7.6mm and thickness of 5.8mm. The bow tapers to a width of 3.1mm and thickness of 3.6mm at the tip. The upper surface of the bow is slightly concavely curved to either side of the central ridge. Corrosion has caused pitting to the surface of the bow which may obscure some subtle decorated of the upper surface. A shallow groove set 0.7mm in the from each edge, along the full length of the bow, seems to be present.

A sub-triangular catchplate is present behind the base of the bow. This starts c.1.9mm from the tip of the bow and has a length of c.15.0mm. The catchplate has a thickness of 1.2mm and extends out from the reverse surface of the bow by 3.9mm.

This incomplete brooch weighs 7.31g, has a total length of 43.5mm and a maximum incomplete width of 16.9mm. The brooch has an approximate curved depth of 14.6mm. This is most closely associated with Dolphin type bow brooches, with hinged pin mechanisms, which date to the first century AD (or possibly T-shaped brooches which date from the first to second century AD.

Class: Colchester derivative, hinged or hinged Dolphin
Sub class: Mackreth 2011, Chapter 3, Part 4, CD H 4.k

Subsequent actions

Subsequent action after recording: Returned to finder

Chronology

Broad period: ROMAN
Period from: ROMAN
Period to: ROMAN
Date from: Circa AD 43
Date to: Circa AD 300

Dimensions and weight

Quantity: 1
Length: 43.5 mm
Width: 16.9 mm
Weight: 7.31 g

Personal details

Found by: This information is restricted for your login.
Recorded by: Ms Helen Fowler
Identified by: Ms Helen Fowler
Secondary identifier: Ms Sally Worrell

Materials and construction

Primary material: Copper alloy
Completeness: Incomplete

Spatial metadata

Region: East Midlands (European Region)
County or Unitary authority: Lincolnshire (County)
District: South Kesteven (District)
Parish or ward: Marston (Civil Parish)

Spatial coordinates

4 Figure: SK8843
Four figure Latitude: 52.97713536
Four figure longitude: -0.69087506
1:25K map: SK8843
1:10K map: SK84SE
Grid reference source: From finder
Unmasked grid reference accurate to a 100 metre square.

References cited

No references cited so far.

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Timeline of associated dates

Audit data

Recording Institution: CAM
Created: 5 months ago
Updated: 4 months ago

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