Thanks for taking the time to post those. It appears to be the same as what I have.
While I have seen many of the 5mm PTC's come apart during my testing, I have yet to see one of these larger parts break down. The 121GW for example uses a couple of PTCs in series for a load. Even with my small generator, we saw that section of the switch breakdown. If the PTCs breakdown, there's not much that will limit the current.
I've had the smaller resistors fail as well during my testing but not these larger parts.
I like how things are spread out. All in all, it looks good and makes sense that it has held up so well with my testing. There's really no excuse that a meter designed today wouldn't consider the basics and handle some basic transients like the 101.