In the left side, an oldest Wirt eyedropper. It can be dated 1887-88 due to the imprint on the cap:
WIRT'S PAT FEBY .3, 1885
& PAT'S APP'D FOR
when Paul E. Wirt did not acquire yet the Marvin C. Stone's patent from 1882. Compared with the above one, it is shorter - Lcapped=128 mm (5⅛ in) and has a different pattern chasing. The feed is a single rubber piece one (see www.kakaurapen.com about WIrt's early overfeed types)