Watch List notes:

(x) Augustus (27 BC - 14 AD), AV Aureus, 7.84g, 8h, Uncertain Spanish mint [Colonia Patricia (?)], struck c. 18 BC, CAESARI AVGVSTO, imposing laureate head right, rev. ornamented quadriga right, containing legionary eagle surmounted by four miniature galloping horses, S.P.Q.R. in exergue (BMC 390 var.; Calicó 275a; RIC² 107a), delightfully centred and of competent artistic style, a pleasing very fine, very rare.
Provenance
The Peter Stagnetto Collection of Ancient Coins
, Spink Numismatic Circular, February 2001, RM0102 - £4,200
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NGC Extremely Fine (#5880397-015). Strike 5/5. Surface 4/5.
, https://www.ngccoin.com/certlookup/5880397-015/NGCAncients/
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The reverse design alludes to the restoration by Augustus to the Roman People, the insigniae lost by Crassus and Marcus Antonius in 53 BC via the Parthian king Phraates IV.
Estimate: £6,000 - £8,000