Canada, Airmail Semi-Official Collection, 1918-32, mint issues on dealer pages; starting with better club & special flights including #CLP2 & CLP5 (cat $500 & $350 respectively), nice run of private airline issues with little duplication, including CL15 ($275), CL29 ($200), CL47 ($125) and a additional unlisted variety in purple (not counted). Scott No. CLP2//CL51; $3,272  Estimate $750 - 1,000. $0