Model Variants (Including Prototypes)
He 111 H-6 - Base He 111 series medium bomber model on which the "Zwilling" is based on.
He 111 Z - Model Series and Prototype Models Designation; 2 examples produced.
He 111 Z-1 - "Zwilling" twin He 111 fuselage model; heavy-lift transport model; 10 examples produced.
He 111 Z-2 - Proposed Long-Range Bomber Variant based on the production Z-1 model; never produced.
He 111 Z-3 - Proposed Long-Range Reconnaissance Variant based on the production Z-1 model; never produced.