This could be the company as reported in The Builder, January 1895…
NEW PLUG-CHAIN FOR LAVATORY BASIN.
“Messrs. Winn & Co. Birmingham have produced a small patent which may be usetul.
The object is to avoid the inconvenience of the chain to the plug of a fixed lavatory basin. The chain passes through a hole at the back of the basin (just above the rim), and is weighted so as to be drawn back as soon as the plug is removed from the plug-hole; the chain disappears, and draws the plug up after it to the rim of the basin. The only fault to be found with this is that a plug that has worn loose, or is not very tightly fitted into the plug-hole, may be drawn out when it is not intended.”