GB 1998 Walsall Dagger Perf Error Pair Perf 14 x 13.5 1st & 2nd Class Stamps on First Day cover with Windsor Cancel , very scarce this fine. STAMP SHOP STAMP SHOP STAMP SHOP. Can't find what you are looking for? The item "GB 1998 Walsall Dagger Perf 14 x 13.5 error SG2039b & 2040b Windsor FDC stamps" is in sale since Tuesday, December 10, 2019. This item is in the category "Stamps\Great Britain\Elizabeth II\Machin Definitives". The seller is "moby390" and is located in Kinross. This item can be shipped worldwide.