Military Payment Certificate. Series 691. $20. PMG Gem Uncirculated 66 EPQ. Replacement Note. Binary Serial Number. First Printing. Binary Serial Number D00001100. Stunning light blue and purple inks on fresh and bright paper. Common as an issued not but really scarce as a replacement. Tied for Top Pop at PMG. No doubt a multi-thousand dollar price tag will accompany this note once the hammer falls this evening.