DescriptionRoss pattern 373B Royal Navy Officer of the Watch telescope engraving.png
English: This image shows a close-up of the engraving on a Ross pattern 373B single-draw Royal Navy Officer of the Watch telescope. Reportedly the telescope has a 44mm object lens and 18x magnification. It also features a stepped diopter ring allowing a preset adjustment to be made to suit the optical characteristics of individual users.
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