Nicola Perscheid Triplet 36cm vs. Doublet 30cm

Comparing Nicola Perscheid Triplet type (F4.5/36cm, black paint removed) vs. Doublet type (F4.5/30cm, standard black paint)
Thickness of tube: same
Height: same
Front element diameter : Triple type (4.5/36cm) is larger
Rear element diameter: same
Screw diameter: Doublet type (4.5/30cm) is larger

nc

n8

nb

n9 na