Obv: (mullet)FRANCIS(lozenge)PENN(lozenge)OF , around shield containing Mercer's Arms.
Rev: (mullet)STONISTRATFORD , around cable inner circle, F(rosette)P within.
M. Dickinson 129.

Note: DNW lot 184, 2nd October 2013. Cataloguer states, "extremely rare; the only specimen known to the cataloguer". This example from a different obverse die.

Sold Jan 2021