1959 John Deere RG4, RG6, RG430, & RG630 Row-Crop Cultivators Operator's Manual N548

This original Operator's Manual is Marked OM-N159136 on the front cover and I believe it to be from 1959.  It is for the following models of Row-Crop Cultivators in the form shown on the cover. RG4, RG6, RG430, & RG630.  The booklet has lain in some moisture at some point and has visible water crinkling throughout, but all pages are legible except for a portion of the back cover, which took the brunt of the damage.  A few pages are shown to give a better idea of condition.  It is 56 pages in length and @ 7 x 9" in size.