The VDMA flatness requirement was included in the FEM 10.2.14 / 4.103 – 1 and from September 2021 in the European standard EN 15 620. It is therefore an official European flatness standard which must be met. This standard was developed at the request and with the approval of VNA forklift truck manufacturers, flooring contractors, engineering firms and universities, and is based on years of scientific research. VDMA is the only standard worldwide that controls all undulations that influence the driving behaviour of the forklift truck. The undulation of a floor is a combination of both (medium) long and short waiviness.
If it’s a non-polarized two-prong plug (both prongs the same size), it’s likely original. Consider getting it rewired for peace of mind.
Etsy and eBay have massive selections, but you'll need to vet the sellers.
Check for fraying, "crunchy" plastic, or electrical tape repairs.
Look inside the socket for scorch marks or loose components. 3. Verify Authenticity
Authentic vintage pieces often use real brass, thick hand-blown glass, or solid wood rather than plated metals or veneers. 4. Where to Shop
Quality vintage lamps usually have heavy cast-iron or weighted bases. If it feels like light, flimsy plastic, it might be a modern reproduction.
Look for geometric shapes, chrome, and frosted glass.