Proof 1871 New Currency issue die proofs (13) on thick surfaced card (all approx. 92x60mm.) comprising 2c. (dated "Aug 26 1871" and marked "BEFORE HARDENING"), 4c. (dated "Aug 23 1871" and marked "BEFORE HARDENING"), 8c. (2, one unmarked the other dated "Sept 6 1871" and marked "BEFORE HARDENING"), 16c. (2, dated "Aug 31 1871" and "Sept 2 1871" and marked "BEFORE HARDENING" and "AFTER HARDENING" respectively), 24c. (2, dated "Sept 5 1871" and "Sept 6 1871" and marked "BEFORE HARDENING" and "AFTER HARDENING" respectively), 36c. (2, dated "Aug 25 1871" and "Aug 26 1871" and marked "BEFORE HARDENING" and "AFTER HARDENING" respectively), 48c. (2, dated "Aug 30 1871" and "Aug 31 1871" and marked "BEFORE HARDENING" and "AFTER HARDENING" respectively), 96c. (dated "Sept 2 1871" and marked "BEFORE HARDENING"). Mainly fine