20 Taka

Bangladesh Bank introduced this denomination in 1979 as part of the post-Liberation currency consolidation, replacing transitional issues that had leaned heavily on Indian Reserve Bank infrastructure during and immediately after 1971. The 20 Taka slot was a relatively late addition to the series — earlier priority went to smaller denominations needed for daily commerce in a country still rebuilding basic distribution networks.

Pick 22 is the first distinct type for this value, and the watermark remains the primary security measure — modest by later standards, but consistent with what Bangladesh Bank could specify from its contracted printer at the time.