Some time ago I purchased an anglo concertina marked William Jeffries.
It has some unusual features when compared to a C Jeffries e.g. flatstock for the levers, extra reeds (36 button) are placed radially as opposed to inboard on earlier Jeffries and the button/note layout is not unlike Wheatstone.
Information on William Jeffries seems to be scarce, but I have no doubt that some of you will probably have come across an instrument of his before.
Pictures of the instrument in question can