Solingen is another one of those names sometimes mistaken for a maker's mark. Soligen is not a maker or a company. It is a city in German that has long been famous for cutlery.
It is illegal to import a knife into the US or sell one here that is marked "Solingen" if the blade was not made in Solingen, Germany. This is part of a treaty between the US and Germany in which we mutually agree to protect long lists of each other's distinctive "trademarks" which really aren't "trademarks". For example, it is illegal to import a product into Germany or sell it in Germany which is labeled "Tennessee Whiskey" if it was not made in the state of Tennessee.
Unfortunately, some companies in Solingen have "sold out" and are abusing their street address within this famous city to make cheap blades, legally mark them "Solingen", and export them to typically China or Pakistan where they are assembled into cheap knives. Those cheapies with the Solingen name on them can be imported into and sold within the US legally as long as they are also marked "Assembled in wherever." It is, of course, illegal for anyone except the final consumer to remove that label or mark. But, once the knives are past customs, those laws aren't very well enforced.
Some time ago, I was at a gun show looking for balisongs and there was a vendor rather loudly hawking "Genuine Solingen German pocket knive... Yes, the FAMOUS German knives from Solingen... And, thanks to a volume purchase, you can own one for just $9.99. That's right, $9.99 for a genuine Solingen German pocket knife." Well, I took a look and quickly realized that these POS cheapies weren't worth $9.99. I breathed on the blade to sort of fog it a bit and you could see the words "Assy in Pakistan". Obviously, the blades had been marked with an ink that satisfied customs, but was easily wiped off (at least off the surface), perhaps with a bit of a solvent of some sort. When I pointed this out, I was asked to move along. When I brought it to the attention of the show organizer, I watched from afar as he walked up, breathed on a blade, took a look and then asked the vendor to change his sales pitch a bit.
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Chuck
Balisongs -- because it don't mean a thing if it ain't got that swing!
http://www.balisongcollector.com