Yes, I agree with you, I was very very lucky.
It was described as a "German Commercial 1908 Model Luger pistol"
Undated chamber, no stock lug,hold open, with military acceptance marks and unit marked. There was a little tiny photo about 3/4" square.
Apart from a little "ding" on the side plate, the gun is in excellent condition and all stacks up correctly according to Lugers at Random page 161 and Jan C Still Imperial Lugers page 20.
Holster has a crown over III on the rear but cannot read the makers name or date.
Price was $1050.00