The mechanism of this stick seems to be a Seimitsu part, though the exact model is unknown. It shares basically the same base as Seimitsu's LS-22 stick, and LS-30 rotary joystick, and some design elements are similar to Seimitsu's newer LS-32 stick. It's not likely to be a clone, unless it's a very very good one: in addition to being the same high quality in appearance and function, it uses the identical screws as the Seimitsu parts.
There's nothing in this joystick that's unlike every other joystick but it has a very short shaft, which results in a short-throw movement that I find very appealing. It has a square gate, which I don't really enjoy as much as a nice 8-way gate, but in pretty much every other respect it's a superb joystick.
There are several other joysticks that use the same or a similar mechanism. Shown below are two, a Sigma 2200-TB and an ASCII Stick II Turbo (AS-5599-MX).
As is normal for sticks as old as these, they could do with a good cleaning and lubing now and then, but otherwise they're maintenance-free. They're nigh impossible to break, and the switches are usually name-brand and unlikely to ever need replacing.