Second: This one belongs to Swarovski Strauss series, and it is an accessory specially designed by lighting department for crystal lamp factory. But many jewelry manufacturers use this because of the small step sign on it, and explain themselves with fake signs, which is not Swarovski's original intention.
Third: the serial number of this series is 8***, which is clearly written in the product information of Swarovski.
Back to the fifth floor, your explanation is too extreme.
First of all, Swarovski is divided into two departments, one is the boutique department (referring to the counter) and the other is the industrial crystal department (semi-finished products, divided into jewelry department and lighting department).
Second: Swarovski's factory in Austria only produces crystals, and this series of crystals are all produced by the original Swarovski factory.
Third: Of course, you can't find Strauss's number on the website of Swarovski Boutique Department, but there is a link to Strauss's website on the last page of the home brand story, and you can find anything you want.