Mike,
Thats cool man...good find.
I have found a couple sets a year apart and one set two years apart.
Below is a twopic displayof a shed I found that I nicknamed candlestick buck. I looked and looked for the other side hoping it would have a base like the candle stick.. 2 shed seasons after first finding the candle stick buck shed I went back in and by accident stepped over a blowdowned tree. About 50 yards from where I had picked up the candlestick shed. I felt something under the tree with the tip of my boot. It moved, reaching under the semi-suspended blowdown, I pulled out the other side to the candlestick buck .... It was well perserved from all the grass and tree covering it. No chews! 2 years!
The last photo is a set I found one year apart..after going back to the same area..about 300 yards from the first shed...the brown...No chews on the year old shed...just discolored from the sun..