Hi Eric,Unfortunately, there is no positively identified 15th century English armour extant, just a couple of famous helmets that might be English, have an English association, but could equally have been produced in the Low Countries (I think this more likely in some examples) or Milan to English customers tastes, and exported.
So, the question arises, is it English style armour you are falling in love with, or is it from the pay-bas? What we do know is that features on the armour appear in English effigies that appear nowhere else, so there was a definite Englsih style, if not a large production of harnois-blanc in England itself. Typical exclusively English features are the deep fauld, the large sets of tassets, sometimes of the same length, both in front, on the sides, and presumably behind, the symmetrical arms that appear in Flemish sources as well, and the fluting which is heavier and not as numerous on a harness as in later German examples.
We do have one positively identified Cuirasse from the pay-bas, founs in an archaeological context of the country, and with a makers mark still evident traceable to Liege - it was found in an excavation of the old outer fosse at Tongres in 1954. Since then, in more recent years, one was excavated accidentally by a tunnel excavator in Dordrecht, that is identical in style (unfortuanately the method of the find precludes an archaeological context), and I have recently found another example in a collection in the States that seems to be genuine as well. There are also several Italian export items in Swiss museums captured in a Burgundian context, and one helmet that is believed to have been manufactured in the pay-bas in the same context.
So I can give you a few extant Low Countries items, but nothing positively identifiable as English outside of famous effigies and brasses.
When you look at effigies, I have always been partial to the Fitzherbert effigy.
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Bob R.