I had a look through the plugs I have.
Bosch wr8dc - made in Russia
Bosch wr8dp (platnum) made in Germany. Bought these for $1.40 each from Repco.
Kicking myself that i bought 14 at $ 1.4; seriously worth buying now - 70c each on special. WR8DP

I have only used in my 2 stroke generator so far, but would probably go good in a Briggs (put a wr8dc in one a few months ago). Cheap for a German made platinum plug.

I don't know about availability over east though.

Champion from repco - made in USA. In the little cardboard boxes.

Some blister packaged plugs made in usa, others 'designed in USA, Made in China'.

Regards
Tyler