Chris Bayley sent me this link. See what you think.
It could just as well go in the Non-UP Forum. Regulators but they’re made entirely of rolled brass. French style mainstock. That Northumbrianish dingus that plugs into the side of the stock. All those keys remind me of the Italian symphonia, too.
Anybody want one?
Thats what happens if you lay your set too close to a typewriter! 
Union Pipes
Set of union pipes, the rosewood stock inlaid with etched mother-of-pearl, the mouthpiece and single chanter of ebony, the pipes of brass with ivory caps or collars, the canvas bag covered with a loose envelope of purple velvet with mother-or-pearl buttons.
Size: Maximum length: 94 cm.
No bellows?? Mouthpiece? How are you supposed to drink while playing (that the only reason I play the uilleann pipes!!! 
)
A canvas bag??
The set is described in Mark Walstrom’s list of sets in Museums published in the Sean Reid Society Journal number 2 as follows.
A hybrid Union/NSP/Musette. 3 drones, 3 regs from common square stock. 6-key union chanter with extra strange double chanter
and for Nanohedron
A canvas bag??
Almost certainly ‘Mackintosh’ material which had been used in the past by northumbrian makers.
Some French makers and also at least one UK NSP maker have experimented with latex impregnated canvas for bags. Easy enough - all you need is a piece of close weave canvas or cloth which is cut oversize and stretched on a wooden frame. It is then given several coats of latex. When dry it is dusted with French chalk to stop it sticking to itself except around the edges. This edge strip is then given another coat and when approaching touch dry the bag is folded and firmly pressed together and when dry trimmed to size. A further strip can be glued around the seam.
Thanks, Chris. Never knew about canvas bags before, but as I got to thinking about it, I figured that something like latex must certainly be used.
At the risk of going off topic
Charles Mackintosh 1766-1843 discovered that a by-product of making coal gas (naphtha) dissolved India Rubber. The material he made consisted of two sheets of close woven fabric joined by this material.
Synthetic bags have been around for some time -
1872 / Patent #1374 / Wise, W.L. / Vulcanised Rubber
1909 / Patent #30115 / MacRae, D / Rubber Bag
1914 / Patent #4933 / Judd, I / Closely woven canvas dipped in a hot solution of equal parts beeswax and linseed oil
1972 / Patent #134605 & 6 / Adams,WJC / Synthetic Bag
1989 / Patent #2211132 / Gore, WL / Bags from Goretex
Liquid latex is latex dissolved in stabilising solution usually ammonia.
Back onto topic
Speaking to the curator of the Bowes museum it seems that it has been examined and the conclusion was that it was parts of several sets put together as an experiment.
Certainly a strange beast. Cannot tell a great deal from the photo other than that square stock is typical of French pipes, drones have an NSP look with the stoppers, chanter appears to be conical but is very slim. Regulators are also very slim and those on the bit that plugs into the side of the stock look like NSP chanters. I especially like the bass regulator – made from brass and nicely warped. Appears too thin to be wood sheathed in metal. A lot of work here for something that is purely experimental.