Ralph K welcome to the forum, I don,t think the tire chains are as rare as the 4 digit serial number that is on your cub
nice find
Billy D welcome also and that is a nice 108 but can you show pictures of the horn set-up, I have never heard of a factory horn on cub cadets
Also can you take a picture of the dealer sticker on that cub and post it for us in the sandbox under the thread labeled "base of operations"?