Labels:clock | measuring instrument | indoor | black and white | black OCR: 3/4 24 33 40 48 AIR MAIL 9/12/15/18 12 FIRST CLASS MAIL CENT RATE PRINTED MATTER- 3 446 23 4 OOKS & CATALOGS ONER 24 TAGES 4 MODE AIR NOT LEGAL FO IN TRADE POST -1 Ca ALE Lis 21. 1.1.