Penny Star on cover with the Extremely Rare Liverpool type A pin trial pmk

1856 (26 March) entire letter to Derby franked 1d. Stars (lower left corner rounded) tied by a fine strike of the extremely rare Liverpool type A pin trial cancellation arrival d.s. (27.3) on reverse. (A similar example but with a larger portion of the lower left corner of the stamp missing was sold for 190 pounds in the Maximus Collection. October 1970)