Tonga new signature 20-pa'anga note (B216b) confirmed

Tonga_NRBT_20_paanga_2015.00.00_B16b_P41_C_089413_f
Tonga_NRBT_20_paanga_2015.00.00_B16b_P41_C_089413_r
B216b: Like B216, but new signatures. Prefix B, C.

Courtesy of Alberto Fochi.