My H140 is unbound, so no nibs on the fret ends. My 157, 535 and Millennium all have nibs although the 535's binding appears to be thinner than the 157 and Millennium, so the nibs aren't as apparent. The Millennium is a 2000, my 157 is 2003 and the 535 is a 2005.
I think pretty much all Heritages with bound fretboards have the nibs on the fret ends. They have a device that cuts the binding down after it has been put on the sides.
Here's a video of them doing fretboards and binding nibs.
https://www.youtube.com/watch?v=xjz0tX9q5t8
The binding should not be inside the actual fretboard. The frets should be right to the edge of the wood, then the binding is applied later.