Something I found when I was clearing my mother's house. I had no idea what it was, but it looked sort of interesting, so I hung on to it. I still have no idea what it is, so would welcome some suggestions.
The size is given by the librarian's glove (which is just present to stop the thing rolling about). It is obviously a glass measuring device of some sort - the narrowness of the internal tube suggests that the units may be smaller than millilitres, but it could be ml, I guess. There is a small glass funnel at the top, with a pouring lip, and the tip is tapered; looks to me as though it is intended to add small amounts of something to a mixture - that sort of thing.
The scale is on one side only, as you see, and the device lives in a cardboard tube. The writing on the end label may be a shelf code or similar, but it looks like a price - 58 pence. If that is true, then:
(1) it was never very valuable
(2) it was purchased after decimalisation (1971)...
(3) ...but soon enough after decimalisation for the UK still to be working in accurate conversions from Old Money.
There was no obvious context given by where it was stored - it wasn't in the bathroom cabinet, it was in a cupboard in the boxroom, with odd drawing tools and spare lightbulbs. As far as I know, my father wasn't into drugs or tricky medication, and he wasn't a chemist. He was a photographer, however (of a sort), and for some years he was an enthusiastic (though disastrous) amateur wine-maker (Sprout Port, anyone?). The clues run out at this point, though of course I'm happy to answer any questions you may have!