Congratulations! It's a beautiful example. I am afraid that I have none of the Muse coins, which I think are generally the most expensive of Republican denarii prior to the Imperatorial period.
Q. Pomponius Musa. 56 BC. AR Denarius (20x17mm; 3.89 gm, 2h). Rome mint. Obv: Laureate head of Apollo right; wreath to left. Rev: Polymnia, the Muse of Rhetoric, standing facing, wearing wreath and stola. Crawford 410/10a; Sydenham 817; Pomponia 15
Roman Republic. Q. Pomponius Musa. 56 BC. AR Denarius (18mm, 3.80g, 3h). Rome mint. Obv: Laureate head of Apollo right; star of seven rays to left. Rev: Q. POMPONI/MVSA; Urania, the Muse of Astronomy, wearing long flowing tunic and peplum, standing left, touching globe set on base with a wand held in her right hand. Ref: Crawford 410/8; Sydenham 823; Pomponia 22; RBW 1488. Near Extra Fine, flat strike on reverse, attractive old cabinet toning. Ex CNG 57 (4 Apr 2001), Lot 952.
That's a very attractive muse. I've only got a single denarius of this series so far but it is one of my favorite coins: Roman Republic AR Denarius(3.81g), Quintus Pomponius Musa, moneyer, 56 B.C., Rome mint. Laureate head of Apollo right; behind, star. Border of dots. / Urania, muse of Astronomy left, holding rod in right hand and pointing to globe resting on tripod; on right, Q POMPONI downwards; on left, MVSA downwards. Border of dots. Crawford 410/8; Sydenham 823 Ex Harlan J Berk, 21 July 2020, ex Gorny & Mosch Auction 146, 6 March 2006, lot 379, ex Gorny & Mosch 133, 11 October 2004, ex Münzen & Medaillen GmbH 14, 16 April 2004, lot 479, ex Münzen & Medaillen GmbH 11, 7 November 2002, lot 930, ex Numismatik Lanz, München 18, 13 May 1980, lot 253
Q. POMPONIUS MUSA ROMAN REPUBLIC; GENS POMPONIA AR Denarius OBVERSE: Laureate head of Apollo right; sandal to left REVERSE: Thalia, the Muse of Comedy, wearing long flowing tunic and peplum, standing left and leaning left arm on column, holding persona (comic mask) in outstretched right hand Rome 55 BC 3.39g, 16mm Crawford 410/9b; Sydenham 821; Pomponia 19
