This type of nipple has not been in common use since before the 2nd world war. They are commonly fitted to commercial vehicles up to the late 1920's, but seemingly not after.
We had two very tired ones surviving on our trailer, and managed to source the promise of another 2 or 3 via our contacts in the steam and veteran lorry worlds.
Given we were still 10 or so short, and didn't have a grease gun we decided to go the more modern route.
I've never had one in bits, but I'm not convinced that there is a non return in them, if so thay are not as good as the later types.
Can anyone confirm? Perhaps the Highwayman, I expect you have them on your Standard?
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