Hej, found some differences between max base Defense values in Docs and ingame. Will post it using copy item text option from D2Stats 3.9.3 to not spam with images, also keeping items unidentified so base value is not touched by affixes ed% because all of them are Rare.
Circlet (Sacred)
Defense: 572
Durability: 8 of 10
Required Dexterity: 262
Unidentified
Coronet (Sacred)
Defense: 685
Durability: 8 of 15
Required Dexterity: 327
Unidentified
Great Helm (Sacred)
Defense: 1552
Durability: 29 of 51
Required Strength: 576
Unidentified
Gothic Plate (Sacred)
Defense: 3382
Durability: 66 of 99
Required Strength: 614
Unidentified
Greaves (Sacred)
Defense: 934
Kick Damage: 0 to 0
Durability: 44 of 81
Required Strength: 595
Unidentified
Bone Shield (Sacred)
Defense: 1120
Chance to Block: 3%
Durability: 35 of 51
Required Dexterity: 527
Unidentified
Buckler (Sacred)
Defense: 1602
Chance to Block: 3%
Durability: 30 of 32
Required Dexterity: 469
Required Strength: 446
Unidentified
Large Shield (Sacred)
Defense: 1953
Chance to Block: 3%
Durability: 51 of 52
Required Dexterity: 529
Required Strength: 480
Unidentified
Gargoyle Head (Sacred)
Defense: 1650
Chance to Block: 4%
Durability: 61 of 62
(Necromancer Only)
Required Dexterity: 443
Unidentified
Thats the only ones i had chance to get so far with max Defense roll higher than in Docs. Will keep my eyes on other Rarity armour bases to confirm if thats case for all of them.