SMGR-0018 Iron cross second class by Julius Maurer marked 138

I’ve seen some super slated “3’s” on the core being described as a Julius Maurer…but all the “138” marked crosses that I’ve seen don’t have the same “3” as those. So I’m not sure what the deal with that…but this one is marked 138, although a little worn on the loop. The cross shows wear and some oxidation on the core. Still, a tough maker to find.