I can't quite find this monogram, can you give me a nudge in the right direction please. It is probably Leo, they usually are in my experience.
Looks like a Marcian to me, based on Dane's monogram page. http://www.catbikes.ch/coinstuff/monograms.htm On Vcoins In CNG's archives
Cool pick-up of a 'cheapie' for a scarce ruler. I just have one of Marcian and I rarely notice many being offered at auction, let alone in 'good' shape.
It came in a lot of three. Normally, I would divide the price by the number of coins, that would make this 2GBP, but the other two are culls and will go straight into the ebay pot.
My Marcian is pretty spotty too... I believe they are a tough Emperor to get high definition? Marcian, AD 450-457 AE4, 11mm, 1g, 6h; Constantinople mint, AD 450-457. Obv.: DN MARCIANVS PF AVG; Pearl-diademed, draped, and cuirassed bust right. Rev.: Monogram 2+ within wreath // CON Reference: RIV X Marcian 545, p. 282. From the Doug Smith Collection, #1753 Purveyed by Herrcoinmeister @John Anthony