Markings were usually fewer on the 45. The 126666 watch you reference is the 12s caliber 35 in its typical 17 jewel lower-end guise.
DG&S is the marking at the beginning, Gruen first appears at 126k. Later small (0s cal 45) movements were only marked DG&S until 130k, even as the 12 and 16 size movements were marked DG&S Gruen [Precision after 128k].