From BeerSlayer: Re-publishing it on St. Patrick's Day seemed somehow appropriate! The term "shamrock" derives from Irish seamair óg, which means "young clover". This information will in no way help you find this cache.
This is actually a new container in the same spot as the previous cache, but because I'm such a nice guy, those of you who already found the previous incarnation can now get credit for a whole new find. All you have to do is to sign the new log sheet!
Have a seat the only place that feels natural and find this cache in plain sight.
It will likely go unnoticed by anyone not looking, yet the place I left it is right before your eyes. Its shape makes it look right at home but its color may be out of place. You can also distinguish it by touch.
Listed as a gadget cache in case the screw is ever on too tight. You would then need a Phillips-head to open it. Most times you probably won't.
Despite the size, there is room in the cache for little more in the cache than the log and pencil. Flat trackables might fit.
Yes, I'm aware the sticker on the bottom shows a 4-leaf clover and not a shamrock. In that sense, I've got a sham Shamrock on my sham rock.
From BeerSlayer: I do not remember there being any seat there... 
Due thanks go to BeerSlayer for "maintenance on a cache that seems abandoned but worth preserving" and Blurreo is glad to have it back.
Update, 3-Apr-2018: This cache has now been rated at H11122 (by me) at handicaching.com:
