The gold-filled cap pulls off--there might have been an eraser, but not now. The pencil uses the standard 1.1 mm lead and is a nose drive mechanism. The blue body is celluloid. It's a fun pencil to use--it feels substantial and is still in perfect working condition.
Besides the American Eclipse company, there was also a thriving Canadian branch. If you would like to know more about it, a website has been created by the Tully family to explain their involvement and the history of Eclipse in Canada. Eclipse Fountain Pen and Pencil Company--History
These are my other Eclipse examples from previous blogs--links below the photos.