The eyepieces are Kellner-type with a single achromatic doublet as the eyelens.
Of the original three eyepieces two remain. A: No. 2, B: No. 1. ES: Eyeshade
The original Universal microscope came with five objectives ranging from 2in to 1/8in.
The microscope optics consist only of the objective (A) and Kellner eyepiece (B).