# C7 , Map of the US and 2 Mail Biplanes , and # 591 , James Monroe , on this US Contract AirMail Route No 9 East , CAM 9 , First Flight Cover , FFC . Correct in time use of 20 cents , for the 1926 airmail postage rate , for the distance between Minnesota and California . Pilot - William S Brock . Machine cancellation Jun 7 , 1926 , 2:30 PM , Saint Paul , Minn , Commercial Sta . American Air Mail Society Catalogue , AAMS , # 9E4 , Type 9 black circle cachet . First Flight Inaugurating Contract Air Mail , Chicago - Twin Cities , St Paul , MN , 2:30 PM , June 7 , 1926 . Addressed To : Dr Mayhew , c/o Oakland Casket Co , Oakland , California . Return Address : Ernest R Reiff , North St Paul , Minn . Via Air Mail . No receiving cancellation . F-VF , See Scans . $1.00 shipping & handling to a USA address / $2.00 shipping & handling elsewhere . Combine S/H - Add 25 cents more for each additional item . Personal Checks and Money Orders must be drawn on a US bank . Please view my other listings . Thank You . APS # 196666