Christies Late Roman helmet: 1 or 2?

[Urselius]

So do we know the archaeological contest of these two helmets? Do we know the exact location in which they should have been found? The chamber in which they were preserved untouched by time with their original shape, has this place a name?

As I said in my post, this is unknown. What my post was intended to highlight was that "iron helmets of great age can be wonderfully well preserved and that, therefore, good preservation does not constitute a hindrance to authenticity in itself".

The Sutton Hoo helmet was placed in a chamber and it shattered into a mosaic of corroded fragments, the Coppergate Helmet was in a wood-lined pit - I wouldn't become wedded to the idea of a chamber, possibly the best preservation would be produced by a helmet falling into anoxic silt in a watery place.