Defaults: IQ-5 and others.
Connoisseur is a skill, described in Basic Set, p. 185, and referenced in GURPS Dungeon Fantasy 2: Dungeons™, p. 14, on evaluating loot; GURPS Martial Arts, p. 56, on taking Weapons as a specialty; and GURPS Low-Tech Companion 1: Philosophers and Kings™, p. 13, on the application of iconography to Connoisseur (Art).
- On the breadth of possible specialties 
- On its usefulness to a black-market dealer 
- On spelling it