July 4, 2015, was the 150th anniversary of the first Wonderland Philatelic Congress. This event was celebrated by producing a series of four stamps (in different colors; blue, red, green and purple) together with two covers.
The stamps have no monetary postal values as mail from the Congress HQ is free within Wonderland.
The stamps were printed in sheets of 16 and in two different sizes (either 16 large stamps or 16 small stamps). Furthermore, all 16 stamps in a sheet would either have an overprint “MidPex 2015” or no overprint at all.
Proof sheets, signed by Gerald King, exist for the large stamp sheets.
Sheet of 16 stamps (large stamps without overprint)
Example of a sheet with 16 large stamps (4 different types of stamps) without the overprint “MidPex 2015”. The sheet is signed by Gerald King in the lower right corner:
 04-JULY-2015. 150th Philatelic Congress. |
Proof Sheet (large stamps without overprint)
Example of a proof sheet (for the sheets with 16 large stamps without the overprint “MidPex 2015”). The sheet is signed by Gerald King in the lower right corner:
 04-JULY-2015. 150th Philatelic Congress. |
Sheet of 16 stamps (small stamps without overprint)
Example of a sheet with 16 small stamps (4 different types of stamps) without the overprint “MidPex 2015”:
 04-JULY-2015. 150th Philatelic Congress. |
Sheet of 16 stamps (large stamps with overprint)
Some of the sheets were overprinted “MidPex 2015”. This exhibition was held at Royal Leamington Spa (in Warwickshire in England) on 4 July 2015 in acknowledgement to the Wonderland Congress.
Example of a sheet with 16 large stamps (4 different types of stamps) with the overprint “MidPex 2015”. The sheet is signed by Gerald King in the lower right corner:
 04-JULY-2015. 150th Philatelic Congress. |
Proof Sheet (large stamps with overprint)
Example of a proof sheet (for the sheets with 16 large stamps with the overprint “MidPex 2015”). The sheet is signed by Gerald King in the lower right corner:
 04-JULY-2015. 150th Philatelic Congress. |
Unique error sheet (large stamps with overprint)
During the production of one of the above sheets (large stamps with overprint) an error happened and the sheet was soaked in gum which made the entire sheet blurry. The sheet is signed by Gerald King in the lower right corner:
 04-JULY-2015. 150th Philatelic Congress. |
Envelopes
Envelopes were produced for the issue of invitations to the Congress. Each envelope has two of the large stamps (without the “MidPex 2015”-overprint) and a special congress cancellation which is repeated on the reverse. The envelopes are signed on the back side by Gerald King.
 Cover 1 (front) |
 Cover 1 (Back) |
 Cover 2 (Front) |
 Cover 2 (Back) |
Each envelope contained thed following invitation:
 Invitation inside envelopes |
Different examples of the stamps
Below are some different examples of the Wonderland 150th Philatelic Congress stamps (including some blocks of 4 stamps which have been signed by Gerald King).
 04-JULY-2015. 150th Philatelic Congress. |
 04-JULY-2015. 150th Philatelic Congress. |
 04-JULY-2015. 150th Philatelic Congress. |