It's an Sieg SX3 with the longer table (might be called an SX3L or something) and an aftermarket DRO, along with various modifications (some essential, like the spindle lock lever). Lots of info on mine is on my website (link: https://www.cgtk.co.uk/metalwork).
For a benchtop mill, it's a nice little machine, although I'd much rather have a floor standing one. Like all benchtop ones, there's a distinct lack of mass so it struggles under heavy cuts. The spindle depth DRO is terrible (I replaced mine it was so bad) - jumps all over the place. The display thing can also get glitchy with heavy cuts (i.e. with vibration), but hot melt glue on the connections sorts that.
That all makes it sound awful, which it isn't. I'm sure to a user of an FP1 or a Bridgeport it would be shockingly bad, but I've done an awful lot with it and it's coped with everything I've thrown at it. Read the pages on my website about the mods I've made and why. I'm happy to answer any questions about it.
Oh, and buy a fairly decent vice to go with it if you get one.
Many thanks, I'll have a look and read. It's to upgrade a Chester 16v, don't have the space for a "big" mill but would like something with a bit more rigidity.