Cayman Is The Creek CDS JA 31.Straight-line violet CENSORED earliest known date

1940 cover to USA with 2 1/2d with The Creek CDS of JA 31.Straight-line violet CENSORED Type CH2 at lower left (used at Cayman Brac and The Creek).Envelope reduced at left and some colour run at base the earliest known date for this Censor mark. Ex James Podger