SCIENCE STAMPS. Two Cheques with Science Stamps usage. Top cheque from Security Bank and Trust Company, 16 June 1969, with P4.80 Documentary meter cancel and corresponding Science stamps also totalling P4.80 with manuscript cancels. Two filing hole punches and minor wrinkling from affixed stamps on reverse. Bottom cheque from Philippine National Bank, 7 January 1974, with 4c Manila Documentary meter cancel and corresponding 4c Science Stamp on reverse. Very nice mixed bank usage.