There are very few issued £50 notes known from the pre-partition era.
Northern Bank £20, £50, and £100 notes from the 1914-1918 era which were overprinted for use in Northern Ireland post 6 May 1929 are well-known, and most varieties are readily available.
Nothern Bank Fifty Pounds 1914 with 1929 overprint.
Fifty pounds was a huge sum of money in the era of the old banknotes and it is unlikely that any issued, non-cancelled notes would have been retained except by accident. However, examples of early £50 notes are available to collectors in the form of cancelled or specimen notes.
Here is an example of a Provincial Bank, Limerick Branch, specimen note from the 1830’s with portrait of William IV.
Attachments
Provincial Bank 50 Pounds Specimen ca.1830-1837 Limerick.jpg (169.7 KiB) Viewed 28 times