I have had a batch of Sentinel style grease nipples made. Having hopefully got back to everyone that expressed interest in advance, I now have a small stock of them, assembled and ready to fit. Old original on left, reproduction to right:
They are made to Sentinel drawing 3323H and are 7/8whit x 1/4BSP, fitted with stainless balls & springs to reduce the chances of them corroding & sticking like the old ones did. They are assembled with bearing grade Loctite 603, so if there is ever need to clean them out they can be disassembled.
I shall be at Onslow this weekend & Old Warden next month if anyone wants to look before committing.
Cost is £120 for 10, including UK postage.
Simon.