"..so if it's not written in brass, there is room for doubt."

I think this could be a new mantra!

It's a good maxim for working on the sextant list, at least.

I count 97 entries for pairs of Brandis numbers.

There are 18 Brandis sextants in the wrong boxes.

I haven't double-checked to make sure that every pair of numbers from the boxes have been put in the list independently.

The awareness of how many mismatches there are between the sextants and the boxes only became apparent over the course of time.

I could put a little trailing column on the table to help tabulate "Wrong Box" (WB) or "Wrong Sextant" (WS).

Any Day Now.

In the interim, the rate of mismatch is at least 18% and, if I have got all of the Wrong Boxes on the list, then it is more like 23%.

So, in this case, we have one number from the sextant and the other from an inspection certificate pasted to the box. It seems to me there is something close to a 1 in 5 chance that those are not a valid pair.