Loved them. A couple of other ideas: Germans also tried to pick up Lewis guns (there was a bounty paid on them), and of course the SRD marked jugs of rum (Seldom Reaches Destination). For the British in addition to pickelhaubes, there is the famous photo of the two souvenir-hunting British soldiers outfitted in German Sappenpanzer - the trench armor used by sentries - which they must have just found after clearing a German trench. The British also tried to obtain German sniper scopes, "donkey ear" range finders and trench telescopes - as the British had been cut off from the supply of high-quality optics like Zeiss lenses. For a humorous touch, you could do up a German Xmas tree!