Hmm... I have had a HP rubber dome keyboard that looked exactly like that from the outside except for being ISO layout, but it did not have Alps-compatible keycaps. The barrel plate is slightly different also although the barrels are still square. Actually, I still have the case for it. It was made by Silitek.
While the 1×1 keys are Alps-compatible that is no guarantee that the stabilised keys would have Alps or Costar/Cherry-compatible stabilisers.