First authorized day of use of bisected 4 cents on St. Jan was February 20 1903. See BISECT USAGE IN 1903
Engstroms book "Danish West Indies Mails" illustrates
the only cover known to have been canceled on St. Jan - March 27 1903.
The cover below - is the only known cover with a bisect being mailed to St. Jan - January 23 1903.
The recipient of this cover was Mrs. Zielian at Cruz Bay - the wife
of the Postmaster at St. Jan - Sophus Emil Zielian. He was first and foremost the "Landfoged" (County sherif) of St. Jan which besides being the Postmaster included being police officer and Judge. Mr. Zielian was also chairman of the Colonial Council. Please
see the Historical note below.