Discover has a nice gallery of pre-1900 anatomical models.
An unknown scientist injected this arm with wax to preserve its structure and highlight the complex network of blood vessels. Dutch botanist and anatomist Frederik Ruysch is credited with perfecting the morbid preservation technique.
This model can be unscrewed from its base to show the cornea, pupil, and the iris. Glass replaces the jelly-like vitreous humor. Ambitious artisans could also paint veins on the eyeball to give it a more life-like appearance. This specific model is fitted with a pair of eyelids as well.
(thanks to Christel Broady!)