Hullo everybody,
Willem
Looking at the above info from a Soenda perspective, it doesn't seem to be a sword (Pedang Abet). I believe it to be a Golok Pandjang Djoeragan (high-end long golok).
The salient points:
Blade type: Wilah Iwoeng
Handle: Perah Tjeker Kidang (generically Ngeloek Djengkol)
Scrolled band: Beoebeoer Rerenggaan Pariaman
This type would be quite frequently encountered from the coastal areas of southern Soematera to western Java (which includes parts of today's Central Java Province). Age, probably 19thC to early 1900s.
BTW, ... in answer to your question: No, it's not Javanese.
Hope it helps.
mvg,
P.S. Good luck on the sale!