Convex Lens on Stem f =+50 mm

Crown Glass Prism 60°, 30 mm x 30 mm

Crown Glass Prism 60°, 45 mm x 50 mm

Crown Glass Prism 90°, 30 mm x 50 mm

Crown Glass Prism 90°, 45 mm x 50 mm

Flint Glass Prism 60°, 30 mm x 30 mm

Set of 10 Watch Glass Dishes, 125 mm

Set of 10 Watch Glass Dishes, 80 mm