1912 Erfurt Luger

Just got this one. Ive been after a pre Great War Luger for some time, persistence does pay off.
The good. All matching, and unit marked.
The bad. Refinished at some point. But the fact its pre GW and unit marked makes up for that to me.
Back to the unit marking...seller claims it is XXI Army Corp, 31st Div, 32nd Inf Brigade, 70th Infantry Regiment,5th Co as the 10th weapon. I asked him how sure he was of his research, he claimed about 80% sure.
Would love some other thoughts. Very pleased with this one.