Burgred, King of Mercia. Burgred. AD 852-874. AR Penny, 21mm, 1.39 g. BMC type d. London mint. Moneyer Dudwine. Struck ca AD 866-870.

BVRGRED REX, diademed bust right.
MON DVDPINE ETA and triangle of dots in three lines in three sections. 

Seaby 941B; BMC 268; Grierson, Coins of Medieval Europe 101; MacKay V4.20 (this coin, BNJ 85, 2015); North 423.

With permission of cngcoins.com, auction Auction 464, lot 290, March 2020.
From the Richard A. Jourdan Collection of Medieval European Coins. Ex Spink Numismatic Circular CI.7 (Sept. 1993), 6132.