Most expensive coin set
- Who
- King of Siam Proof Set
- What
- 3190000 US dollar(s)
- When
- 28 May 1990
A record $3,190,000 (£1,889,027) was paid for the King of Siam Proof Set by Iraj Sayah and Terry Brand at Superior Galleries, Beverly Hills, California, USA on 28 May 1990.