Garand drawing/revision # question
Hello all, first time posting. I just purchased an M1 at a gun show and have a question about the drawing #. It is a Springfield serial number circa 1,699,XXX dating around June 1943. According to the Joe Poyer book, the revision # circa this time frame skipped from 27 to 29, my receiver is stamped D 28291 28. Certainly this is unusual, and the 28 has been intentionally omitted from the table. The heat lot is 0 4 2 with the diamond. If anyone has encountered this or has some info it would be appreciated, TY