Gulden Ophthalmics Berens-style loose prism set. 16 acrylic prisms in the original blue velvet-lined case: ½, 1, 2, 4, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50 diopters. Gold “Another Berens Instrument by Gulden” label inside the lid and the original cleaning instruction plaque (mild soap and water only — never alcohol). Made in the USA. All prisms are present and the set is complete in its case.

All prisms and the red filter are present and seated in the fitted case. Includes the full range of prisms: ½, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, 50.