Hi,me again,you guys are great,lots of solved questions for me.
Here's another one,a little tougher,I can't even comment about it because I have NO clue what it is,it is a 134 but the grill covers the whole stamp,it's very hard to see but with my goggles on and magnified I can make out the grill pattern faintly across the whole stamp.
Ok guys,what is this ?

