Well that was fast- browsing around Ebay a couple weeks ago I came across the first Chinese knock-off of the Leonardo Momento Zero! Which itself has only been in production for what, 2 years? I guess the Momento Zero must have some universal appeal to have been copied so quickly. It's a very true copy, too. I think the Leonardo folks might want to look into whether legal action might be necessary!
The pen in question is the Moonman 800. It's virtually identical in size, shape, and weight to the Momento Zero. Right down to the odd little kink in the section. In fact, you can swap out the caps. They're even threaded alike. I actually like the color on the Moonman knock-off. It's a tiger eye material, PenBBS uses it and calls it 'Amber is a Cat'. I think I also have a Bexley in this stuff.
As far as differences go, there are a couple. The roller clip doesn't have the same elegant taper of the Leonardo's, and there's a trim ring where it attaches to the cap. There's also an additional trim ring in the section. And the nib is labeled Bock. I don't know if it's legit or if that's a copy too. Doesn't look to be finished to quite the usual Bock standards. Oh, and the price. The Moonman came in at just under $50- pricey for a Chinese pen, but cheap for a Momento Zero.
Below you can see some comparison pics. What does everyone think? I'm a little flattered for Leonardo, and a little perturbed as well...