Coat of Tweed
From Dungeons of Dredmor Wiki
Artifact Armour (Torso)
Stained with the chalk of many battles, this sturdy coat enhances your thaumaturgic acumen beyond what linear arithmetic would suggest.
Worth 650 zorkmids. B:1060 S:410 B:1346 S:280 B:1580 S:150
A reference to the tendency of professors to wear tweed and get chalk dust on themselves.