Henry VII Groat class IIa, London, two arch crown, no initial mark

Henry VII (1485-1509),silver Groat, type IIa, London Mint, facing crowned bust in double tressure of nine arcs, two arched crown, trefoils on cusps, beaded circle and Latin legend surrounding, no initial mark (1488-89), hEnRIC'x DI'x GRA'x REXxx AGL'x Zx FRAnCx,rev.long cross pattee, tri-pellets in each inner angle, beaded circles and twin concentric legend surrounding, inner legend CIVI TAS LOn DOn, outer legend surrounding, POSVIx DEVmx A DIVTOR E' mEVm, weight 2.86g (N.1704; S.2195).Toned, a little short of flan, a bold very fine, rare variety.