Cheque circular? Looks rather rectangular to the untrained eye. Again, wikipedia:
Between 1914 and 1918, Cheques Circulares were issued redeemable by six banks for ½, 1, 5 and 10 libras. The Reserve Bank of Peru took over the production of paper money in 1922, introducing notes for the same denominations as the earlier cheques. In 1933, some of these notes, together with unissued notes dated 1926, were overstamped by the Central Reserve Bank of Peru with their values in soles.
Private bank money, then.