I know.. I'm really confused.
It does have the bomb with the RA, and a date code. Just the numbers 9 and 43 separated by space.
And yep, the SN is 60015xx, sorry for potato picture. Couldn't get the thing to focus.
Still, really really confused, here's the pictures.
20181222_152723.jpg
20181222_152733.jpg
20181222_152740.jpg