filarmonica experts

I have an EPBD, and it's in decent condition. Zero hone wear, but faded etchings. I've never heard of a tridur until today, and want to know how to distinguish between a tridur and non tridur EPBD. I'll post some pics in a bit. Thanks for any info, I did a lot of searching and didn't find much besides sold ones.

The TRIDUR will have that word etched on the blade. They have a chromium coating that the regular EPBDs don't have. It's meant as a protection from rust

Thanks! The etching on mine is very faint, so I'm not sure I'll be able to tell.