Hi to all. This is my first time so please bear with me. I recently bought a sporterized Mauser. I know it was made in 1938. All the serial numbers match (even the bolt) and it has only 3 serial numbers. What throws me is that it has 3 identical Nazi eagles in a row on the right side of the receiver with what appears to be a 63 under each eagle. The 6 is in question but the 3 is clearly read. I can find nothing that explains the 3 eagles. Can some one help? Thanks!!