1970-75(无日期)渣打银行10元(绿屋)样钞,编号A/A0000000,另外右下方手写编号688/4,PMG63,一般单字轨样钞较常见,而双字轨样钞则极为罕有。The Chartered Bank, $10, specimen, no date (1970-75), serial number A/A 0000000, green and multicolour, bank coat of arms at centre, bank building at left, nicknamed Green House, PROOF No 688/4 written at lower right,(Pick 74s), PMG 63 Choice Uncirculated. Very unusual as the issued notes bear a single letter as the prefix whilst this shows a fractional prefix. Extremely rare in this format