Armour - two Turn Keys for Lorica Squamata and Newstead-type Lorica Segmentata Breastplates

Two types of turn keys for the breastplates from Roman lorica squamata (scale armour) or lorica segmentata.
These true keys were used for fasteneing the breastplates on lorica squamata (scale armour) as well as the upper breastplates on Newstead-type lorica segmentata armour.

Roman lorica squamata scale armour had two small pectoral plates which were slightly overlapped until the rectangular holes lined up. This type of turn key was then inserted through the two holes and turned locking the plates together. The pectoral plates were fastened with one or two such keys each.

A pair were similarly used for lorica segmentata breastplates on the Newstead-type in the same role as the single buckle on the Kalkriese-type and the articulated buckle on the Corbridge-type.



These come in two main variants. The first has a T-shape, the second has a spade shape. Both are contemporary.

These examples came from near Carnuntum.

Mid-2nd to mid-3rd century AD.

References:

Upper example:
Dura Europos report 7, page 121, # 426-429, 431.
Bishop, Lorica Segmentata I, fig. 6.1, 6.2, 6.11

Lower example:
Caerleon Canabae report, fig. 94, # 204.
Dura Europos report 7, page 121, # 420-425, 430.
One examples was found at Manching, Germany still attached to the lorica squamata plates.