Related Clues:
- Hardly ever seen
- Not to be had
- Bibliophile's label
- One-in-a-million
- Far from frequent
- Of interest to collectors, say
- Chophouse request
- Atypical
- Quite unusual
- Like a 1943 copper penny
- Out of the ordinary
- Like cabs on a rainy day, seemingly
- Facing extinction
- Answer to a waiter, sometimes
- Nearly extinct