Those dating this helmet tend to place it either in the range of the late 3rd early 4th Centuries OR the mid-5th to 6th Centuries, a debate which will likely continue ad infinitum for the following reasons: the metal hinges featured on this example bear a striking resemblance to earlier styles, paricularly those of the Berkasovo-type helmets. This is corroborated by the chinstrap attachment method; we see such features on some earlier helmets but they seem to have fallen out of use by the 5th Century. In addition we should consider the shape of the cheek pieces which also bear a similarity to the Berkasovo-type. All of these would suggest the helmet belongs firmly in the 3rd to 4th Centuries bracket. On the other hand, due to very similar 5th and 6th Century models in the Sassanian sphere and no earlier models found archaeologically in a Roman context, some choose to place the Deir El-Medina into the 5th to 6th Century bracket instead, sometimes even as far as the late 6th Century at the earliest. Compared to the Deir El-Medina’s cousin from the Leiden museum (dated to AD 580), Kerch (dated around AD 550), Jerusalem (early 7th Century), Tarasovo (late 5th Century), Novae (dated around AD 580) and Zadar (6th Century), the argument for this school of thought is that the Deir El-Medina has no contemporaries within the archaeological record prior to AD 450 at the absolute earliest and as such is more safely placed into the 5th to 7th Century date range.
Unfortunately, we have no clear answer in this debate. Both arguments have weight; on the one hand several specifics of the Deir El-Medina’s construction and relevant artworks heavily imply it belongs to the 3rd to 4th Centuries, whilst on the other the complete lack of contemporaries in the archaeological record (but a prevalence in the 5th through 7th Centuries) suggests it could well be a later helmet equipped with a few earlier design elements as a quirk of construction.
This is a popular helmet amongst late Roman re-enactors on a budget, as it has a few surprisingly accurate reconstructions from India that are, with a little modification, easy to wear, to maintain, and tend to be exceptionally durable to damage all things considered. It also has a generally more attractive shape than the basic Intercisa.
Reasonable ground can certainly be found to argue the use of this distinctive helmet (featured quite frequently in artworks and media about the period) on a soldier from the 4th Century all the way through to the 6th Century, potentially with a little leeway either side of those dates.
Debates about dating aside, it is a fantastic looking helmet for the lower-status soldier, and functions well as a helmet for either cavalry or infantry, line trooper or scout.
Pictured left is group member Ian Stephenson wearing a replica Deir El-Medina helmet, image courtesy of Bob and Sue Moore.