German Postmark Identification

darkormex ,

As to the identifications:

1. Probably Gremboczyn (modern Grębocin, Poland). Prior to WWII, that part of Poland was in Germany.

2. This is a Bahnpost (railway) cancel. You can tell by the oval shape, and you can partially make-out the word "BAHNPOST" and "ZUG 17" (Train 17). There weren't many Bahnpost routes that ended in "-UKIRCH". The only one I can find is Schandau-Niederneukirch. I haven't been able to find an example of what a Schandau-Niederneukirch Bahnpost cancel looks like as late as 1916, and I have my doubts that's the correct route. The name doesn't appear to be long enough (the text is symmetrical, so you can tell the approximate length of the name based on how far it extends down one side of the cancel). With earlier Schandau-Niederneukirch cancels, the right-side "H" ends up near the bottom of the date slug due to the length of the name. I'll see if I can find my Bahnpost book in the moving boxes.

3. This is a standard "Kreis-Gitter" (Circle and Lattice) cancel that was in use from the early/mid 1890s until around 1915.

As to the premium, probably not solely because of that fact -- though if it's numerically rare, it would.

It's not complete, but the best resource for all German postmarks is stampsX.