[tom hyle]

Photos are difficult to read compared to examining an object but I'll give a go. Rick, That kris sundang apears to be a sandwich type blade, which is usual. It is possible that it is panel-welded, but one does not often see that much wander to the core on panel welded swords, whereas it is fairly common to see in the side plates from forging out the tip on sandwich type blades (is it kind of helical, or does it go toward the same edge on both sides?). The cheeks of the blade seem to show some contrast internally/macro. The very central (widthwise speaking) area seems to perhaps have a more complex pattern of some kind, but is not clear in the photo? Is it humped, or hollowed? Does it show core or a sort of 5 layer constuction; I've seen kris sundang with 5 macro layers; didn't etch 'em, but it'd make sense if the outer one on the flats was a decorative one, and I don't think I've seen an old kris sundang (this is a kris sundang, yes?) with hollow ground flats, which might expose the core on a sandwich blade. Oop Yes I have, but only as a distinct groove; not the subtle hollowed flat. Looking some more. It looks like a more or less flattened hex cross section. Near the tip there's a small welding flaw within the pattern of the most outer macro layer (?), but I wouldn't worry too much about it.
The dog head sword looks to be displaying a temper line. It could be an inlaid edge, but seems to exhibit a jagged uneveness usually seen only from welds if they are for pattern, which is possible, but I don't think is what I'm seeing. Not at all sure though, and probably being influenced by my expectations. Close-up? The blade has some longwise lines that may be fold lines, but are more likely grindlines, and some cloudy shapes that are probably sheen/patination/etc?
The close close up I can't see much in; I think I see an inlaid edge; I see some kind of layering, and only right at the edge. I'm not sure what to make of the dark area on the blunt (?) side of the tip.
Ian, I see a temper line on the one you show. Note it is the same breadth on both sides; a macro weld on this type of blade is expected to be scarfed, so it is wide on the flat side, and narrow like this on the cutting bevel. I don't see any sign of folding, but it looks like an old sword to me, and it probably is folded steel with the other main likelihood being imported foreign industrial steel, but as I say, I suspect that was often folded as well, by PI smiths. Notice the temper line stops well short of the base of the blade.