I believe there is enough evidence that Chestplate of Vindication, Breastplate of Eradication, and Boots of the Vindicator had appearance changes in Sept 2001.
What specifically the material was, however, I am not sure.
Velious armor material types are designated by using material types 17-23. (from right to left in the following image.)
Example case: Troll Warrior. Changing Breastplate of Eradication to material 22 results in the bottom left (plate).
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However, reviewing this image:
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Breastplate of Eradication would be using material 19 (Scale). Is the Troll instead wearing the Chestplate of Vindication?
There are similar inconsistencies with the Dark Elf chest material.
The wiki has consolidated images for each race/material
https://wiki.project1999.com/Players:Fashion
How should this work?
Are the lucy records accurate for Velious Plate 1/Velious Plate 2?
https://lucy.allakhazam.com/item.html?id=25044
https://lucy.allakhazam.com/item.html?id=25206
The way I am reading is would be Chestplate of Vindication would be material 19, and Breastplate of Eradication 22.