Obverse:

HENRICVS REX ANGLIE. Crowned facing bust, mullet to left and lis to right of crown.

Reverse:

CIVITAS EBORACI. Long cross pattée dividing the legend, with three pellets in each angle, quatrefoil in centre. Annulet in one quarter and after TAS.

A little weak in the centre otherwise about very fine and struck on a larger flan than is usually encountered. 

Ex M. Vosper

This coin would have been previously catalogued as Henry V, class G. The keen observations of both Lee Stone and David Greenhalgh, helped affirm Lord Stewartby's suspicion that the mullet and lis coins fit within the production period of Henry VI. 

"The Mullet and Lis issue of pennies should be relocated from Henry V to Henry VI. They would appear to have been issued in 1430 on the re-opening of the Ecclesiastical mint. This would place them either at the start of the Rosette Mascle issue or possibly, given the single annulet placed in one quarter of the reverse, included in the Annulet Trefoil Sub issue, which also have a single annulet in one quarter, which is currently known only for Calais, but given the extreme rarity of the London pennies of the Rosette Mascle issues, may also have been struck for London but none have been identified to date."

D. Greenhalgh 'A Henry V or VI York Penny Conundrum' British Numismatic Society Research Blog, 23 Aug 2023. https://britnumsoc.blog/wp-content/uploads/2023/08/394-greenhalgh-henry-56-final.pdf

L. Stone, 'An Example of a Henry VI Annulet Issue York Penny from the Ecclesiastical Mint?' British Numismatic Society Research Blog, 28 Feb 2023 - Addendum. https://britnumsoc.blog/wp-content/uploads/2023/02/336-henry-vi-annulet-issue-york.pdf