Hallo Semar,
Lucky, lucky lucky you.
Absolutely stunning golok. I saw it too, but decided to stick to Borneo and Atjeh and not get distracted, however tempting it may be.
I would say also Java,
The style makes me think of the better pre 1900 Tjikeroe weapons.
But this one is different and even more refined.
Great addition to your collection !
Best regards,
Willem