Similar in concept and style to our entries 20315094, 20315105, and 20315106 (among others), this is an ad card from Macau CTT in November 2018.  It has an extra, official, round blue “Macau 2019” chop on the back.  Please note:  this is not a postcard in the normal sense, but could easily be mailed as one.  Grade: 1