There is, in fact, a town here in Germany, (the old DDR) that makes tree ornaments of a milatary theme. The town is Lauscha. It's about all that they do there. It's way back in the hills. You can walk from one side of town to the other in a 1/4 hour, if that.
Just before Xmass, the tiny town is overrun by people looking for hand made ornaments. They are not cheap. Two years ago we bought my son several, a U-Boat, a Zeppelin and something else, I forget what, and I paid at least 60-80 Euro. But they are real nice, and exclusive. Made in the old style, 1900's. There was one store that had only (what Germans would call strange) milatary ornaments. Not real popular here. Kinda suprised me.