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Alexandre E Eremenko wrote:

> In certain case I can provide a date when some sextant was
> made (or certified) by a particular maker, but
> I don't see how to find any more details about history
> of particular manufacturers (except some few very
> famous ones).

Some historians have written articles on these makers in various history
periodicals that not only list makers' corporate lifespans but provide
data that relate serial numbers to the year of manufacture (e.g. Alan
Stimson for Troughton).  Some books also list manufacturers with start
and end dates (G. Turner 19th century instruments book, for example).
Yesterday I looked through a biography of J. Arnold and his son that had
an appendix listing many of their chronometers with the entire service
life - year of manufacture and year assigned to each vessel and year
retired.

As a wannabe collector (lacking money, mostly), I have found a lot of
info and can help out with the dates of older makers.

Would you consider putting the list on Wikipedia so others could add and
modify the info?  It could be a "List of sextant manufacturers" page
linked to the sextant and the reflecting instruments pages.

Mike




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