Watch List notes:

Anglo-Saxon England, Secondary Series (710-760), Sceat, Series O related, Monster in flight, looking back, foreleg raised behind head, tail with pellet end over back, gaping jaws, long crest above, prominent member, clawed feet below, rev. cross-crosslet over saltire, central annulet, 1.11g, 0° (SL 59-30 plate coin; SCBI 69, 610 this coin; Spink 807D), rich dark patina, a really bold very fine, extremely rare.
provenance
M Vosper, January 2014
~ Found near Boston (Lincolnshire)
[EMC 2014.0056 = BNJ Coin Register 2014, no. 59]
Estimate: £900 - £700