i guess i just assumed EVERYONE ran toyota t-stat o-rings on these things..lol..ive beem running this type of o-ring for soo long, that i forget ive gotten them in the car till i pull the t-stat..ive also re-used them many, many, times, without issues..
Your t-stat has the wrong country stamped on it.
No, I didn't test it but I did drill a tiny bleed hole in it which I pointed upwards once the engine is in.