For your consideration is this vintage Opti-Locator inspection tool.
This features a retractable lens assembly and an angle-adjustable tail stem.
This measures about 4 3/4″ with the lens retracted and about 6 1/4 with the lens extended.
The condition appears to be good, with finish wear and scratches on the metal body where it looks like paint or some other substance was scraped away at some point. The lenses seem good and clear.
Please see the photos for more detail.