I took the liberty of contacting Mr. Joel Jacobs,(Land and Sea collection). He actually responded within 1 hour of my inquiry. I have copied his responding e mail and am going to post it in this thread! I am going to ask him to overlook the Ameliapedia sextant data link, that I supplied to him. When he has time.
I also am going to be contacting a friends father, whom was a Navy Captain for 27 years. It is worth the effort to see if he can, one help with the data table, or two supply information on the NO records. Also am working a time out to examine the antique collection of sextants. That I previously mentioned. Below is the responding e mail from Mr. Joel Jacobs from The Land and sea Collection.....
"Hi Jim,
Having an long term interest in aviation I am familiar with your org's work and applaud your efforts. We are very busy right now (Christmas Shopping Season) so I can't spend the time analyzing your comprehensive information, but we have one each example of a Brandis and a David White in stock.
See 1944 David White,
http://landandseacollection.com/id888.html Very likely in the original case.
and a Brandis, Ca WW I see,
http://landandseacollection.com/id858.html Likely not in the original case.
I have found that Naval Observatory numbers are not always in chronological sequence on clock dials. I have not compared them on sextants because the NO notation is only on the certificate. I have never seen an NO number on the instrument.
As far as the Brandis instruments there is a brief history of the company that we accumulated from many sources maybe some from your own org.
We agree that an original Brandis instrument would have the sextant serial number stamped on the box as well. IOO, this would likely be on the wood near a hinge and on opposing sides as in one of your pictures. They should be the same and match the quintant.
Thanks for your complement, but we are far from knowledgeable about this brand since this is the first instrument we've ever purchased for resale.
Let me know what you need further,"
Joel Jacobs
JOEL HARRY JACOBS, LLC
Land And Sea Collection
2287 SW Brookwood Lane
Palm City, FL 34990
772-287-7022
Visit our website:
http://landandseacollection.com