AD1865 was build from some different factory around the world. Some may have from Malaysia, some from Philippines, some maybe from anywhere around the world. I collected some old AD1865N, probably from year 90’s and some N-K series from 2000’s. I think, Analog Device also changed the font size. Newer one got smaller font size.
It’s gonna be interesting to see how good the N-K would be, vs the lower grade N series.
The old N series got Philippines engraving on the back side. Hope I got a good batch! 😉