My price guide books that I use for quick model reference don't show any John Deere models like that, but the numbers look like they just might be Echo built saws as Echo had some similar numbers in the late 90s.
John Deeres current pro line of saws are the Italian built saws supplied by Efco. Their numbers run CS36, CS40, CS47, CS52, CS56, CS62, CS71, and CS81, with the number being the CCs. They are very good quality saws. I am familiar with them as I sell them as Efcos.
I believe John Deeres have been Remingtons, Echos, Homelites and Efcos, in that order. (but that may not be all of them)