IMP XXXXII COS XVII P P (type I, B) (441 / 450)
Bust of Theodosius II facing, cuirassed, wearing a helmet with crest and a pearl diadem. Holding a spear passing behind his head with the right hand and a decorated shield with a horseman slaying an enemy, with the left hand.
Constantinople seated left on a throne, holding a spear with the left hand and a globe surmounted by a cross with the right hand. A shield behind the throne and a star in the field to the left.
Marks
Photo of a coin sold on 09 January 2009 by Stack's Bowers Galleries, Sale#148 - N.Y.I.N.C Auction, lot 435, link to the sale: https://www.acsearch.info/search.html?id=564242, link to their website: https://stacksbowers.com/.
Mark CONOB.
Variant with INP instead of IMP on the reverse. Another copy with the unmistakable INP word has been sold on 13 August 2013 by Stack's Bowers Galleries, August 2013 Chicago ANA Auction, lot 34085, link to the sale: https://www.acsearch.info/search.html?id=1652305.
Note another coin of the same type with a Germanic barbarian style, further showing the multicultural composition of the Constantinople mint at this period. Coin sold on 10 October 2016 by Gorny & Mosch Giessener Münzhandlung, Auction 241, lot 2971, link to the sale: https://www.acsearch.info/search.html?id=3385602. Coin ranked AYC #22 degen 3, RIC 324.
Let's add a copy of the same type with an offset engraving on the reverse, the word IMP (INP here) is not aligned correctly with the rest of the legend. This copy is type I, while the legend ends at the level of the shield and not before, however we find all the other attributes of type I: tall and elongated character, square throne, triangular leg.. Coin sold on 14 March 2011 byFritz Rudolf Künker, Auction 182, lot 968, link to the sale: https://www.acsearch.info/search.html?id=959186.
Type I: with mark CONOB or COMOB (CONOB here) and the reverse legend usually ending before the shield. No punctuation on legend on either side. A square throne, the right leg as a triangular protuberance, stiff drapery and vertical scepter. This corresponds to type III of RIC X. Var B is the same as RIC X: smaller and rounder shield.
See AYC #21, RIC 323: https://www.all-your-coins.com/en/archives-anciennes/romaines-imperiales/imp-xxxxii-cos-xvii-p-p-type-i-a-441-450, for the commentary explaining the entire coinage.