This is a Dutch East Indies Undated Pre Stamp Cover Front & Back.  It's definitely from the early to mid 1800s, but there's more to it than just its age.  It was sent to Pambune 3, addressed in Dutch and Chinese with chops.

What makes this special are the black boxed FRANCO 125b and GRISEE 48.  It also has an M/S '85' used as postal charges.  These marks are RARE in black.

Take care because this item, though in very good shape, is still extremely old!