Inhouse product
| GERMAN NUMISBRIEFE (NUMISMATIC COVERS), WHICH ARE COLLECTIBLE COMMEMORATIVE ENVELOPES CONTAINING BOTH A POSTAGE STAMP AND A MATCHING COIN OR MEDAL. |
| TOP: MAX PLANCK NUMISBRIEF |
| PERSON: MAX PLANCK (1858–1947), THE NOBEL PRIZE-WINNING PHYSICIST KNOWN AS THE FATHER OF QUANTUM THEORY. |
| STAMP: A 1994 GERMAN FEDERAL REPUBLIC STAMP (100 PFENNIG) ILLUSTRATING QUANTUM THEORY. |
| POSTMARK: CANCELLED IN ESSEN ON MAY 5, 1994, FOR THE 119TH INTERNATIONAL STAMP FAIR. |
| COIN: A GERMAN 2 DEUTSCHE MARK COMMEMORATIVE COIN FEATURING MAX PLANCK'S PROFILE, ISSUED BETWEEN 1957 AND 1971. |
| BOTTOM: KONRAD ADENAUER NUMISBRIEF |
| PERSON: KONRAD ADENAUER (1876–1967), THE FIRST CHANCELLOR OF THE FEDERAL REPUBLIC OF GERMANY. |
| STAMP: A 100 PFENNIG STAMP FEATURING HIS PORTRAIT, LIKELY PART OF A SERIES HONORING GERMAN STATESMEN. |
| POSTMARK: CANCELLED IN BONN ON APRIL 19, 1992, MARKING THE 25TH ANNIVERSARY OF HIS DEATH (HE PASSED AWAY ON APRIL 19, 1967). |
| COIN: A GERMAN 2 DEUTSCHE MARK COIN FEATURING HIS LIKENESS, WHICH WAS A STANDARD CIRCULATING COMMEMORATIVE COIN IN WEST GERMANY. |