K98 German Mauser Front Sight Marked

Description

K98 German Mauser Front Sight Marked.
This has been in storage for 20+ years. It belonged to my dad who was a gun dealer who specialized in WWII weapons.
It is in excellent condition. There is no blade with it, but could possibly be in another box. I have yet to figure out my dad’s organizing system!
It appears to be marked, but I am not familiar with what it is. If you would like more pictures let me know.