| Date/Name Ship |
1890-02-00 PIETERTJE |
| Manager: |
Frederik Koopman, Groningen, Groningen, Netherlands |
| Eigenaar: |
Frederik Koopman, Groningen, Groningen, Netherlands |
| Shareholder: |
|
| Homeport / Flag: |
Groningen / Netherlands |
| Callsign: |
PQJB |
| Date/Name Ship |
1918-00-00 PIETERTJE |
| Manager: |
C. Christensen, Vejle, Denmark |
| Eigenaar: |
F. Hansen, Vejle, Denmark |
| Shareholder: |
|
| Homeport / Flag: |
Vejle / Denmark |
| Callsign: |
NBWK |
| Date/Name Ship |
1920-00-00 PIETERTJE |
| Manager: |
C. Christensen, Vejle, Denmark |
| Eigenaar: |
N.A. Laursen, Vejle, Denmark |
| Shareholder: |
|
| Homeport / Flag: |
Vejle / Denmark |
| Callsign: |
NBWK |
| Date/Name Ship |
1921-00-00 SANDE |
| Manager: |
N.A. Laursen, Vejle, Denmark |
| Eigenaar: |
N.A. Laursen, Vejle, Denmark |
| Shareholder: |
|
| Homeport / Flag: |
Vejle / Denmark |
| Callsign: |
NBWK |
| Date/Name Ship |
1924-01-22 POLARSTERN |
| Manager: |
Peter Pump, Uetersen, Germany |
| Eigenaar: |
Peter Pump, Uetersen, Germany |
| Shareholder: |
|
| Homeport / Flag: |
Hamburg / Germany |
| Callsign: |
RDTQ |
| Additional info: |
Call sign since 1934 DIPC, since 1949 DGZS. |
|