Great Britain 1929 PUC GBP 1 'Postal Union Congress'
- Maker
- United Kingdom
- Year
- 1929
- Rank
- 85 of 100
Great Britain 1929 PUC GBP 1 'Postal Union Congress'
Great Britain 1929 PUC GBP 1 'Postal Union Congress' by United Kingdom (1929) is ranked 85 in the FLOAT 100 for Stamps. It carried a price-guide value of $1,400 on 1 January 2026, which is not a sale. Britain's iconic high-value commemorative — the must-have keystone of 20th-century GB collecting.
What is it, and why is it in the FLOAT 100?
Britain's iconic high-value commemorative — the must-have keystone of 20th-century GB collecting.
SG 438, GBP 1 black (KGV), Postal Union Congress; mint; ~61,000 printed
What is the best-sourced number for it?
- Figure
- $1,400
- Kind
- Price-guide value, not a sale
- Date
- 1 January 2026
Stanley Gibbons catalogue value GBP 1,100 for a fine unmounted-mint single (SG 438); a very-fine UM example sold at this dealer asking GBP 950. Guide-value: USD ~$1,400 is an approximate conversion of the load-bearing GBP 1,100 catalogue figure.
This is not a sale. It is what the market was asking, and no transaction is recorded behind it. Source.
How this is made
- The figure
- One reference price, taken from a named public source and shown with its own kind. FLOAT does not average it with anything or adjust it for time.
- Realized or not
- A realized price is a completed sale. A market asking price and a price-guide value are not sales, and are labeled as such wherever they appear.
- Why no grade ladder
- Most FLOAT 100 entries are individual objects. There is one of this, so there is no population and no spread across grades to show.
- Archive
- 2026-08-08