Under a close up from the tip.
And here direct links to the other (original pictures)
http://67.59.155.243/images/doecon/k0600501.jpg
http://67.59.155.243/images/doecon/k0600502.jpg
http://67.59.155.243/images/doecon/k0600503.jpg
http://67.59.155.243/images/doecon/k0600504.jpg
http://67.59.155.243/images/doecon/k0600505.jpg
http://67.59.155.243/images/doecon/k0600506.jpg
http://67.59.155.243/images/doecon/k0600507.jpg
On picture 4,6,7 you can clearly see the pamor. Its hard to give a simple answer about establishing age, any indication about age is a guess. But then again, some guesses are more better then others.
Good guidelines are; color, wear around the edges, number of pamor layers, traces of grains in metal, the way the layers are bend etc etc. As soon as you think you know the period, compare it with reliable dated keris (maybe there is one in a museum near you
. In the exemple above you'll probably end up in the 16th century..but then again that my guess
Sheath, hilt ect.. are of course more recent. Its very hard to find even a 19th century keris with original sheath, handle, mendak etc (I have some, will share them later).
One reason is obvious (and mentioned above), its hard to keep a piece of 200 year old wood in good condition in the tropics.
The second reason is that keris blade are (locally) seen as valuable, but the rest is not (well not always). Most of the "new" owners simply want to change the "clothes" of their old blade. Put on a brand new sheath with shiny new brass cover is still seen as a good thing. You also dont wear the same clothes all the time, right ? The old ones sometimes is simply thrown away (trust me I see it happen a lot).
To Illustrate: I was on a market in Solo, few months ago. Found a nice old blade, in a good 19th century cover. Seller wanted to do me a favor and change the old cover with a brand new, for free even...He really had difficulty to understand why I wanted to keep the old one. In the end I left the market with an old blade in a flashy new sheath, meanwhile carying the old cover in a plastic with me of course
I can't comment on the "catch", and I dont see any reason I should
But I'm sure the new owner will be happy with his new collection addition.