Hi John
Here are some stats for you in my collection.
Oldest Serial# Jackal is a S.A Parabellum 3971, to 'Newest' Serial# Jackal is a Hi-Power 11388
If you count Air Arms Oldest Serial# is a Hi-Power 17314, to 'Newest' Serial# is a Hi-Power 34562.
Now if you you count Wood Stocked Air Arms Oldest Serial# is a Camargue 22759, to 'Newest' Serial# is a SE90 40920.
Regards
Paddy