Antique/Vintage Weights/Fluid Measurem

An Antique/Vintage Nest of two sets of Weights or some form of fluid displacement type measure.
Even though they are aluminium, the engraved qualities are written in an old form of writing, which makes me think they're Antique. The mahogany box also looks a quality antique item.
This is not a modern reproduction but a genuine antique.
The small clip which claps each shaft would benefit form a clean / polish.
The large weights go from 6 FL OZ to
0.5 FL OZ.
The smaller weights go from 6 FL DR to 0.5 D OZ. (There isn't a 5 FL DR but a 1 FL OZ)
Please let me know if you know what they are for, thanks.
The box is approx 12 1/4" long by 4 1/2" wide by 2 1/2" deep & has two keys.
This is a nice quality item.
Please study the images, as they also form part of the description & please do your own research.
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