Not just the orange has Limited edition on it
The orange marking versions were very limited editions of 250 pieces each, and you had black face and carbonfibre face (Titanium) versions, being different models. (01-92, 01-94, 01-96, 01-97)
You also can get blue, red, yellow and 'phantom' markings on both 01 and 03 92 and 94, which I believe (iirc) all have Limited Edition on the face too. None of these appear to be successfully repped (IMHO) as the colour seems to look wrong in the pictures. The same seems to be true of the 03 Military version.
Lume on all the reps is also generally very poor, with the hands usually just painted with normal paint.
Have a look at bellross.com (under the 'Collection' drop down) and you can see all the range.
I haven't seen how the new 01 case with lug screws compares to the gen but it's certainly a step forward. I think I would go for a plain white or black face 01-92 in carbon (PVD) finish or Stainless Steel as they will look near to gen if you get a correcntly moving automatic movement (28.8k bph)and don't take it off to show anyone lol