It may be that your safe pre-dates the stamping of data on the top of the door but just in case I attach a clearer illustration (arrowed).
Attachment 20352 Attachment 20353 If you let us have the serial number as painted on the top hinge this at least will confirm when it was made.
What might also help are photographs of the interior of safe with the door open at 90 degrees to more clearly show the lock case details as photo above left. This might help distinguish whether it's a List 2 or 3.
There's also a possibility that this is a 'plate' safe i.e. without fire-resisting linings intended for the safeguarding of non-inflammable items such as Silver Plate.