Not just the lever but everything I see on this rifle is top notch.
To my eye, the little things such as the shape of the flat on the stock, how the checkering works with the shape of the grip, the sling swivels, how the lever comes down and meets the grip cap, etc. are what put this particular Martini way above most that you see.
I want to know how much of this build did you do on your own. It all looks like “Guild” quality to me!