All I can say is I doubt the originality of any “rare” Luger or accessory. Fakes are ridiculous and common in Lugerworld, but sell it to the guy who thinks his rare Luger matches your rare stock, maybe you can retire on it. And no, because you bought it at auction separate from the gun doesn’t convince me it’s real. Im personally not impressed with his flaming bomb adored Luger either, so many bombs. Reminds me of fake SS Lugers or rifles with skulls stamped all over them.
As to that Luger forum, reading the thread they posted on deaths head Lugers gave me eye cancer. Idiots.