2 x 455 Revolver questions

These 2 rounds seem a little different to the norm,question is are they?

  1. Mark 2 case ,lead bullet, hs. KYNOCH .455 all looks usual except for the primer .its a small Tinned ,domed primer with a Cerise/Purple seal , could this be a Proof round and or an over seas contract ?

  2. this is also a Mark 2 case with lead bullet ,large copper primer ,very small headstamp letters K 455 2Z another Kynoch round with a headstamp type I have not seen before , when or who was it made for ? thanks randy