Thanks, David,
I found interesting story on this interesting Charles Knaud's kris... The images of "wayang" in the bottom part of the blade reminds me to some reliefs of Sukuh and Cetho temples in the eastern part of Solo, Central Java. The specific wayang reliefs dated back to the end of Majapahit era...
On Sukuh Temple or Candi Sukuh
http://en.wikipedia.org/wiki/Candi_Sukuh
On Sukuh Reliefs
http://id.wikipedia.org/wiki/Candi_Sukuh
On Cetho Temple of Candi Cetho
http://en.wikipedia.org/wiki/Candi_Cetho
On Tantric Buddhism influence
http://en.wikipedia.org/wiki/Vajraya...Southeast_Asia
On Knaud kris as David just posted
http://commons.wikimedia.org/wiki/Fi...86046-1%29.jpg
GANJAWULUNG