The Cross Pendant

I'm seeking age and origin of the following.  If anyone has any ideas or information, I'd appreciate it.

The pendant is over 40 years old but exact age is unknown.

It looks like it was "carved" from a grayish metal.

There's a sort of filigree around the center object which is a cross or sword.

The edges have little "balls" - 6 on each side, one at bottom.  They appear to have been hammered and/or filed.

The whole piece seems to be from one piece of metal and is bent outward from the front a bit.  I.e., the front curves outward slightly so when you set it down on a flat surface, the right and left sides hover over the surface.

FRONT:

The "cross" looks like a sword; on the handle, the left and right globes have a design in them like a four-petal flower, north, south, east west (common amongst many cultures).

At the bottom of the cross/sword is an ovalish thing with what appears to be writing.  I cannot make it out, the closest I can come is "SKKz" but the z part is more like a christmas tree if you ask me.  For all I know it may not even be Roman letters.

BACK:

There is a stamp of "800" on the backside in clear tiny lettering.

Same design on sword's handle as on the front.

Bottom of sword has something, not sure what, could be more writing.  UTRD maybe?

Flatter than the front, but equally designed

CHAIN:

The chain may not be original to the pendant, although it appears to be made of similar metal.  Its links are soldered so you can barely tell that they're not all one piece.  There are two "normal" links in between larger, more complex ones.  The complex ones have an "x" piece hugging the middle of larger links; there's a slightly heavier circle hugging the middle of the x formation.

Pictures below.  Click for larger version.