This coin is thoroughly circulated, but has only honest wear. I’d grade it at VF20 (although European collectors would probably knock it down a grade on general principles).
The obverse shows Queen Isabel the Second in profile from the bottom of her neck up, facing to the right. Her hair is held up with a tiara and pulled back in a bun with a ribbon dangling down. The legend reads “Isabel 2 ^A/. Por La G*” from 7:00 to 11:00 & “De Dios Y La Const.” The date is at 6:00: “.1858.”
On the reverse, the Coat of Arms of Spain is centered, with the denomination on either side at 9:00: “1.” & at 3:00 “R^L/.” The legend reads “Reina De” from 7:00 to 11:00 & “Las España” from 2:00 to 5:00.
Identification code: KM-606.3 (1857-1864)
Mint Mark: 8 sided star = Barcelona
Mintage: unknown (but fairly small)
Country of origin: Spain
Composition: 90% Silver
Size: ~15mm in diameter
Weight: 1.31 grams (0.038 oz ASW)
Estimated Value: $15 with silver at ~$27/oz (I probably paid too much for it, but, I like the coin)