Obverse:

EDWARD VI [D G A]GL FRA Z HIB REX. Crowned bust r. elaborate vestment.

Reverse:

[INOMIC]OS EIVS INDVAM CONFVSIONE. Oval shield with garniture, E R beside.

Very darkly toned, good fine and very rare. 

Ex Arthur M. Fitts III Collection, CNG Auction, 16 Nov 2022 - Lot 832

"A one time palace owned by the bishops of Durham, Durham House was situated in the Strand, London, with grounds which stretched as far as the Thames. It was taken over at the time of the dissolution by Henry VIII, and opened as a mint during the reign of Edward VI. The date is not definitely known but is thought to have been 2 December 1548. The history of this mint is shrouded in uncertainty, largely because its under-treasurer, John Bowes, never formally accounted for his office."

J. Bispham, (1985) ‘The base silver shillings of Edward VI’ BNJ vol. 55, 134-43, pls.