Watch List notes:

Frankish or Frisian, Uncertain (630-640), National Series, Imported Gold, Tremissis, "Nietap" Type 1, crude bust, rev. double cross in beaded circle, vestigial legends, 1.19g (SCBI 69, 1090 this coin; cf: T&S 73 = Sutherland 90 = Crondall 95; Metcalf [2016], 22) waterworn, the obverse devices somewhat crude, otherwise about very fine, scarce.
provenance
J Philpotts, April 2012,
Reportedly found at Heckington (South Lincs)
[EMC 2012.0120]

Estimate: £500 - £600