The properties are set when you pick the armour up, so if you want to re-load and try again it will have to be from before you opened the chest it was in (or hitting alt near / running your mouse over the chest). I got 410 for each of the silver and Larian armour, but had to re-load a few times to do so (using Identify, rather than geting a merchant to do it). This is what I got for each;
Silver Breastplate - before the easter egg upgrade
Durability 23
Charm Quality 2
Armour 410
10 Constitution
15 Resistance to Poison
Polymorph +1
life Leech +1
Armour Of Larian - after the easter egg upgrade
Durability 19
Armour 410
4 Agility
10 Defense
40 Vitality
20 Magic
10 Resistance to Fire
40 Resistance to Lightning
20 Resistance to Poison
3 Hearing
Lightning +1
