At the risk of being a wet blanket, I am compelled to point out that the Seebataillon Reservist Tschako and photo thereof are mine. In fact, I have used it (with red background) as my avatar for years. I purchased the Tschako from Ray Zyla's Mohawk Arms nearly twenty years ago, and it has never left my possession. The Tschako in the Überzug is not mine.
This is the original JPEG, taken 31 Dec 2004, prior to Photoshop editing:
That's interesting for sure and I don't see how but after close examination the field badge looks like the photos you posted. The one with the cover looks different though at another angle. These photos are in my Seebataillon folder in my drobox with the other photos of the shako I bought from Weitze. I'll go back and look at my folders and double check. If I have to, I'll remove the cover from mine and check it out.