B2, B2b, B2 vars (20, 20a, 20 var) 1917 2¢ on 4¢ orange Red Cross semi-postal, right-margin block of four with VARIETIES - small second "S" on lower-right stamp (row 2, pos 6 - unlisted in Stanley Gibbons) and comma after "2c" (row 1, pos 5 - Scott B2b (SG 20a)), P.O. fresh, OG, two bottom stamps are OG, NH.
