Nice find! I would keep it too.
Everyone knows...
"Close only counts in horseshoes, hand grenades, slow dancing and nuclear war."
Let's say, just for fun (a hobby supposed to be fun?), serial numbers as well. (Not for real, though, because the purist will pop a vein)
So it is a horseshoe solid. It is also a horseshoe radar and a horseshoe bookend and a horseshoe binary. Therefore most def a keeper.