Triple Motion Polishing machines, designed and built by Diffraction Limited, are used to polish certain lenses. Here optician William Masionis applies a special liquid used in the process.
Digital Commonwealth — Boston Public Library

Triple Motion Polishing machines, designed and built by Diffraction Limited, are used to polish certain lenses. Here optician William Masionis applies a special liquid used in the process.

[ca. June 1962]

CC0 — Public Domain
Digital Commonwealth — Boston Public Library

[Information from item housing] Lenses

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