1966 Birds (ord) block x 4. Folded through middle and light brown mark to top lh value (see scan). Unmounted mint with normal for comparison. Very scarce error, only 30 blocks known.The item "1966 Birds block x 4. Cat £3800" is in sale since Tuesday, April 30, 2019.
This item is in the category "Stamps\Great Britain\Elizabeth II\Pre-Decimal (1952-1971)". The seller is "wickham_stamps" and is located in Bromley. This item can be shipped worldwide.