I *think* it is a copy of the Schlage Primus, rather than the ASSA Twin, as it has different heights and angles of the cuts in the finger-pins, and the sidebar has no coding whatsoever, it is the same in all of the cylinders I've opened up . They are from different sellers and different transactions, so I doubt that I've simply got the same coded sidebar.
If it is a copy of the Schlage, does anyone know if the patent protection is the same, and thus expiring this august. The key has the Widen Innovation logo on it, as do the Schlage Primus keys.
Here's a picture of the key, two top pins, two bottom pins, two finger pins, and the sidebar itself.

Also, although the UK ASSA Site referrs to it as simply the ASSA 4800, the Swedish site referrs to it as the Twin Combi 4800. Is this the same technology (but with 3 finger pins not 5 or 2) as found in the Twin Combi 5800 and 1800 models?
(and yes, this is the lock and key in my sig)