D (II) Model (Economy Model)
D (III) LX Model (Deluxe Model)
D (III) - HD Model (Heavy Duty Model)
D (III) - NP7A (NEWLONG Type)
D (LP-1) - Feather-Lite Model (SAC-UP Type)

Double Thread Models

DT - N2 Model (for 2 lines of Stitch, simultaneously)
DT - N1 Model (for very heavy bags closing)
D (LP-2) - Feather-Lite Model (SAC-UP Type)