navy or artillery?

[research]

serial is 7913 and has 13 on various parts
germany
i


under the germany on the barrel I think the symbol is an i
Attached Thumbnails
Click image for larger version Name: 199.JPG Views: 0 Size: 133.3 KB ID: 55552

Click image for larger version Name: 200.JPG Views: 0 Size: 129.1 KB ID: 55553

Click image for larger version Name: 201.JPG Views: 0 Size: 143.9 KB ID: 55554

Click image for larger version Name: 202.JPG Views: 0 Size: 147.9 KB ID: 55555

Click image for larger version Name: 203.JPG Views: 1 Size: 143.9 KB ID: 55556

Click image for larger version Name: 204.JPG Views: 0 Size: 121.1 KB ID: 55557

Click image for larger version Name: 205.JPG Views: 1 Size: 122.0 KB ID: 55558