All values of the set can be found with double overprint.

The 5 Pf and 50 Pf values are known with overprint sloping from top left to bottom right, instead of from bottom left to top right.

All values of the set except the 3 Pf value can be found with inverted overprint.

The 30 Pf and 80 Pf values can be found with plate flaws on the underlying stamps.

At varying times after the introduction of the Tientsin Provisionals, four additional values were overprinted by the Tientsin Post Office using the original handstamp.  The exact details of their creation are varied and uncertain.  These are among the rarest issues in German colonial philately.

The 25 Pfennig value is believed to have been produced as late as 1904 or 1905.  A total of five copies are known, all unused – one single and a block of four that was broken-up for sale no later than 1925.  It is believed that they were produced years after the other values as samples for the Reich Post Office or as a favor to a dealer to whom the Reich Post Office owed a large sum of money.

The 40 Pfennig value was created around the time of the original issues, though the reason for doing so is unknown.  Unlike the other values, legitimately used copies of the 40 Pfennig exist with date-appropriate postmarks.  Though the exact number created is unknown, current estimates place the total at 30-60 copies.

The 2- and 3 Mark values were created following a request by Leutnant Erich von Salzmann, a German artillery officer stationed in China.  Lt. Salzmann’s father, Generalleutnant Paul von Salzmann, was a prominent stamp collector of the time.  Two copies of each of the 2- and 3 Mark values are known – one mint copy of each, and one copy of each favor canceled at K.D. Feldpoststation No. 2 on 28 February 1901.

All values of the set can be found with double overprint.

The 5 Pf and 50 Pf values are known with overprint sloping from top left to bottom right, instead of from bottom left to top right.

All values of the set except the 3 Pf value can be found with inverted overprint.

The 30 Pf and 80 Pf values can be found with plate flaws on the underlying stamps.

At varying times after the introduction of the Tientsin Provisionals, four additional values were overprinted by the Tientsin Post Office using the original handstamp.  The exact details of their creation are varied and uncertain.  These are among the rarest issues in German colonial philately.

The 25 Pfennig value is believed to have been produced as late as 1904 or 1905.  A total of five copies are known, all unused – one single and a block of four that was broken-up for sale no later than 1925.  It is believed that they were produced years after the other values as samples for the Reich Post Office or as a favor to a dealer to whom the Reich Post Office owed a large sum of money.

The 40 Pfennig value was created around the time of the original issues, though the reason for doing so is unknown.  Unlike the other values, legitimately used copies of the 40 Pfennig exist with date-appropriate postmarks.  Though the exact number created is unknown, current estimates place the total at 30-60 copies.

The 2- and 3 Mark values were created following a request by Leutnant Erich von Salzmann, a German artillery officer stationed in China.  Lt. Salzmann’s father, Generalleutnant Paul von Salzmann, was a prominent stamp collector of the time.  Two copies of each of the 2- and 3 Mark values are known – one mint copy of each, and one copy of each favor canceled at K.D. Feldpoststation No. 2 on 28 February 1901.