Does it have a long curved arm on the ejector box? The Oberndorf, high clip hump, modelo 1909 and Original Mauser marking, I think, are pretty determinative of a Peruvian. Is the front receiver ring longer than a regular large ring Mauser? If so, then I think the only Mauser that has all those characteristics was the 1909 Peruvian. I would think it would have been difficult if not impossible to remove the crest without either messing up the Original Mauser marking or ending up with a front ring that wasn't the same diameter its entire length. I've never read of any that remained in Germany and weren't delivered, but I suppose anything is possible although if it didn't have the crest I don't understand why it would have the Modelo 1909 marking.