Cleaned it up yesterday enough (to take apart) to properly clean and rebuild it later...
And with more cleaning, more p/n were revealed -- C-275369 cast into the body
From this thread
https://www.onlycubcadets.net/forum/...ead.php?t=5107 I've determined that it is indeed an oem Carter carb for a K321A
Carb (129)2.jpg
It's interesting to compare the differences between this one and my chinese copy. The brass bits are all a bit more refined on the oem, and the fuel bowl and float are thicker, so more durable...
Of course, it would take a machinist's kit to measure how closely the jets and passageways actually match between the clone and the oem...