Deli Prism Spectacles Optical Prism Glasses Scientific Vision Aid Cased

Brand: Deli (appears marked) Type: Prism spectacles / optical viewing glasses Era: Mid-20th Century (approximate) Material: Metal frame with prism lenses Colour: Silver-tone frame Includes: Original fitted box and additional prism attachments Use: Optical assistance, scientific or technical viewing application Condition: Used vintage condition with noticeable oxidation and wear A vintage pair of Deli prism spectacles supplied with original fitted case and additional prism viewing attachments. These specialist optical glasses feature rectangular prism elements mounted within a lightweight metal frame. Such items were used in optical, scientific, medical or technical applications where image displacement or altered viewing angles were required. The lot includes the spectacles, two larger prism attachments and the original storage box. Condition Vintage used condition. Visible oxidation/corrosion to prism housings. Surface wear and age-related marks throughout. Original box shows wear, staining and ageing. Untested. Please study all photographs carefully as they form part of the description.