I'm not sure if Sunningdale's "Bottle" hole has ever been anlaysed or drawn?
CB Macdonald admired the hole and his 8th hole at The National was inspired by it.
First is a pretty bad pic looking back on the 12th hole. The hole is in transition. It's being remodelled by Harry Colt. Colt's green is in the foreground and Parks is short and left of it, you can just make out the flag.
I don't have a date for this photo and I'm not sure if Macdonald saw it in this phase or as Park designed the hole. The photo must be in the 1901-1910 time frame.
Anyway, if you look back you can see the ditch/dyke that crosses diagonally and creates the "Bottle" effect which I believe is what CBM descibes in his book.
Here is a later drawing (1920s or 1930s) that shows Colt's hole. I have attempted to draw roughly, in pink, what Park's hole would have been like.
Notice that in the fairway, the Dyke has been filled in. The hole is basically like this today.
Finally a photo at a date between the two above. Park's green is gone. The heather has been allowed to grow in from the right (playing direction) and the Dyke has been filled in on the left hand portion of the fairway(playing direction).
NB Above...Joshua Crane the father of all course rankers, is assigning a score of 8.7645 to the 12th
I wonder which green Macdonald saw? The Colt green is raised up on a knob so it's more like the 8th at NGLA, Park's green is fairway level.
Would the 12th have been better if they had kept the diagonal Dyke and the bottle effect?