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.
This cover is send from St. Thomas to St. Jan.St.Thomas (FRIDAY) January 23 - Arrival cancel St. Jan (Tuesday) January 27. This cover sent to St. Jan is unique.
Backstamped St. Jan January 27.