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Demonstrating a previous lack of restraint, here are my box sextants.

 As far as determining “original” is concerned, I go with “exquisite manufacturing”. Originals are usually works of art. Also, as Bill Morris writes, fine details, slender and delicate looking parts, smooth crisp edges, and sharp square corners.

  I’ll add that every original I’ve seem has the silver arc inletted flush with the face. Reproductions usually have the scale proud of the face.

 The cover that’s removed and attached to the back as a handle can be threaded or a bayonet mount. I prefer the bayonet as threads seem to suffer slightly more through the years.

 Most eye openings have an open hole and a pinhole. A few have open holes, a pinhole, and a sunshade. I prefer the sunshade addition. The installed sunshades just cover the index mirror and don’t allow you to check index error with the sun.

 I’ve seen claims that a docking pin for the magnifier proves originality. Most have it but my “West Strand London” does not.

 Beware - the two adjusting screws near the index knob “rock” the mirror on a pivot with small brass screws. Be sure to loosen one screw before tightening the other. Be gentle.

 Beware #2- The scopes that push into the body are often held with the bottom edge of the sliding view plate. Just move that brass slide away and use your fingernails to pull the scope out. 

 I suppose a scope is necessary to be complete but, when I take a sight, I don’t use it and then it’s one more thing to keep up with - or to lose.

 In addition to scopes, box sextants seem to lose their cases. Bottom row - three “Travel jewelry cases” $10-$12 and easier to use than the originals.

 Prices? With shipping I’ve paid from $75 to $200 and up to $373, October 2023, for the Cooke, Troughton & Simms including shipping from England. It was perfect, perfectly described, and is a joy to use.

Regards, Noell

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