| Original title | Dyrekøbt Venskab | 
|---|---|
| Danish title | Dyrekøbt Venskab | 
| International titles | Der Schwur des Schweigens, Dearly purchased friendship, Dearly Purchased Friendship | 
| Other titles | Tavshedseden | 
| Leikstjórn | August Blom | 
| Screenplay | Bernhard Holz | 
| Appearance | Thorkild Roose, Robert Dinesen, Henry Seemann, Else Frölich | 
| Land | Danmark | 
| Domestic distribution | Fotorama | 
| Technical info | 770 meter, 35 mm, Stum | 
| Danish theatrical release | 07.08.1913 | 
| Cinemas | Kosmorama (København) | 
| Kommentar | Nordisk neg. nr. 913. | 
      Companies | 
  |
| Production company | Nordisk Films Kompagni | 
| Domestic distribution | Fotorama | 
| 
       | 
  |
      Instruktion | 
  |
| Instruktion | August Blom | 
| 
       | 
  |
      Manus | 
  |
| Manus | Bernhard Holz | 
| 
       | 
  |
      Medvirkende | 
  |
| Oberst von Branner | Thorkild Roose | 
| Ralf, officer | Robert Dinesen | 
| Udo, officer | Henry Seemann | 
| Alice, von Branners datter | Else Frölich | 
| Medvirkende | Egill Rostrup | 
| Medvirkende | Svend Bille | 
| 
       | 
  |
| Type | Source | Forfatter | tíma | 
|---|---|---|---|
| Program - stumfilm & mikro |