33 unusual brass gauges all numbered in wood box -- I have no clue what they are

Description

You are bidding on one interesting set of brass gauges in a wood box as pictured.
All of the gauges are numbered. All of the gauges are brass. Each gauge has the same shape at the left end and the same shape at the right end, each has the same radius on the right end, each is beveled on one edge, and the only variation between the gauges is length. One exception -- one gauge appears to be a homemade replacement. It is on the far right in the upper row with 3 gauges in it.
The shortest gauge is marked "4", while the longest gauge is marked "50". A few of the gauges are double stamped or over-stamped.
They go up by single numbers from 4 to 24, and then they go up in even numbers from there to 50. There is no gauge #8, and there is no gauge #42. The homemade gauge is not numbered, but would be about #27.
The gauges, not including the replacement gauge, are about .048" thick.
The box is finger jointed, and appears to be mahogany.
The shaped piece is fixed inside, and it has "J FRANCIS" handwritten on one end where it is hidden when the lid is closed.
The set including the wood box weighs 1 pound 15 ounces on my postal scale.
Measuring from straight edge to straight edge, not including the little point, some sample overall length are:
gauge #4 -- about a 32nd under 11/16" or about 17 mm.
gauge #12 -- about a 32nd under 2" or about 50 mm.
gauge #21 -- about a 32nd under 3-1/2" or a bit over 88 mm.
gauge #23 -- very close to 3-13/16" or about 97 mm.
gauge #48 -- about a 32nd under 8" or a bit over 202 mm.
gauge #50 -- about a 32nd under 8-5/16" or about 211 mm.
All of the gauges are in good condition with some tarnish. Some have some random scratches, but no consistent scratches that might give a clue about how they were used or secured. Again there is no #8 and no #42.
The box is in good condition.
Please send me a note if you know what these are!
SHIPPING: 3 pounds when boxed, insurance is included. No International shipping.
I sell what I enjoy, and I collect antique woodworking tools and I enjoy photography!
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SHIPPING IN THE US: I would rather that you spend your money on my stuff, and not on shipping.
I package well, and have a great track record
of getting everything to each buyer, and getting it there in one piece.
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INTERNATIONAL SHIPPING: I no longer ship Internationally.
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PACKAGING: Please check my feedback -- I package well. I figure if you take the time to purchase from me, then I can take the time to package it well, and not just throw it into a cereal box with a scrap of newspaper.
I hope someday I will meet some of you as we trudge the happy road of tool collecting!