- Who
- Stamp Camp USA
- Where
- United States (Elkland, Pennsylvania)
- When
The largest collection of rainbow-related items consists of 1,133 stamps and was achieved by Stamp Camp USA in Elkland, Pennsylvania, USA, on 3 June 2011.
The largest collection of rainbow-related items consists of 1,133 stamps and was achieved by Stamp Camp USA in Elkland, Pennsylvania, USA, on 3 June 2011.