Convair 580

One of the members of the CV-240 family, which was introduced in 1947. The 580 variants were converted from Convair CV-340 (Allison Prop-Jet Convair 340) or CV-440 aircraft with two Allison 501 D13D/H turboprop engines with four-blade propellers, in place of piston engines with three-blade propellers, an enlarged vertical fin and modified horizontal stabilizers.

This example is seen in Air Chathams livery which provides flights to the Chatham Islands from Auckland, Wellington and Christchurch. (planespotters.net)