Watch List notes:

Guatemala (Central American Republic), 1/4 real, 1851/31, very rare, NGC AU 55, finest and only specimen in NGC census. KM-unl (1 for type). Decent strike with full details including bold 5/3 overdate (possibly just the first time it has been singled out, the 1851 date rare in any case), just a little high-point wear and with muted luster, the tree-side rim particularly nice. See note in lot 919 above regarding the rarity of the opportunity to see both the 1845 and 1851 issues in the same sale in choice grade. NGC #2096381-006.

Estimate: $1000-2000