Greek helmets galore

[MeinPanzer]

Furthermore, find spots and archaeological context are really of little consequence when discussing ancient Greek helmets, as the place where they finally came to rest in antiquity tells us very little about where, when, and for whom they were made since they were passed on as heirloom objects, taken as booty in war, dedicated at distant sanctuaries, and otherwise exchanged far beyond their place (and time) of manufacture.

I'd really have to disagree with you here. As with any artefact, the findspot and date is central to the understanding of its context. Helmets, like many types of objects, were moved around a lot and could be used for some time, but where they are found and in what context tells us a lot about them. For instance, we know that Attic helmets are almost exclusively employed in Greece and the Hellenistic east between the end of the fourth and the first century BC. If you find such a helmet in, say, Sicily, it would tell us something very important about trade and the desirability of such helmets.

To take a non-Greek example, in the last two centuries BC or so the Montefortino helmet becomes the most popular helmet among the early Sarmatians living in the northern littoral of the Black Sea. We find these helmets far away from their original area of production, but comparisons with contemporary Italian examples in the details of their production tells us a lot about Roman contacts with the region and the popularity of such helms and their desirability, as well as allowing us to use a whole different set of data (Sarmatian material culture) to date them.