It is now Annex 1? Or 2? ( As there was never an Annex 1 list, I think Annex 2 has been relabeled Annex 1.)
Regulation (EU) 216/2008 has a series of Annexes of which Annex I is a list of essential requirements for airworthiness. Annex II to the Regulation is a list of the categories of aircraft that are not required to comply with Annex I (or any other EU Regulations) but are regulated by individual member states (just like the good old days). There is no need for an "Annex 1 list" as any aircraft not falling under Annex II is, by default, an EASA aircraft.
If, as I believe to be the case, factory production of the DR1050 was stopped before 1 Jan 1975, it is an 'Annex II' aeroplane.