Watch List notes:

Isle of Man, Dumbell's Banking Company Limited, unissued £1, 18- , serial number 145703, black/slate-grey with arms at upper-centre flanked by lion & unicorn, value to upper corners and ornamental border surround, reverse decorative guilloches with arms at centre,, (IMPM 263e, Q323), extremely fine and unusually good condition for type, as a point of interest this bank collapsed in 1900 due to illegal speculation by senior members of staff.

Estimate: £400 - £600