I don't know who the manufacturer is but I ordered the following from Focalecig and couldn't be happier with the quality, I wish it was seamless but some are and some aren't.
The engravings on the button and tube are etched in and have nice depth, the switch performs flawlessly after cleaned.
Drip tip is not plated but solid stainless and brass, nicely etched also.
http://focalecig.com/Product/Stingray-StyleNo-Mechanical-ModGolden-1x18350-18500-18650--18274
Here it is with a "white russian" sitting on top with the included drip tip.
When I first got it, no patina
I haven't polished it whatsoever, just wipe with a microfiber cloth every now and then.