What a find! I was here to get pictures of the KZUE La Tremenda Radio station tower, and I find a John Deere No.4 Big sickle bar mower (along with a couple other pieces in such bad shape I have no idea of manufacturer or model number). I've been looking for Old Agricultural Equipment for quite a while.
This mower is located on the east side of Radio Rd, just south of OK Hwy 66 on the east side of El Reno. It is almost due west of the KZUE La Tremenda radio tower. Info I found on the internet says they were made from 1934-48, and stock was still being sold as late as 1952.