There is the clue
Thanks very much. I like the way he has used the tree to very nearly hide the tower.
Not necessarily the case but it would be quite a bit of fun to recreate that old image from exactly the same spot. From a quick side by side comparison of the two images I would say that the old black and white image was taken from a spot just outside the right side of the more recent colour image. Looking at the way the midground hills are placed in comparison to the background hills in both images I would also be inclined to say that the black and white picture was taken from slightly lower on the hillside. Where was the colour image taken from?
I don't know?
Doesn't look much like the North Devon or Cornish coast to me and if it's the Yealm which seems probable, it's out of your way going South.
I stand corrected but still a bit out of the way for the OP going South
Well I am not in a hurry!
No idea but it would only be a sheltered anchorage at best looks to be open to the West and both Lundy and Appledore ( river Taw ) looking better prospects.
Thanks to Momac for naming the location, I had a look at Google Earth and the good news for you is that the original image was most likely taken from the SW Coast Path about 1/10 mile from the A399 just west of Watermouth and Combe Martin. Unfortunately there is no Streetview imagery from the path, but using shoreline features to compare with the original, my guess is that it was taken somewhere between the two pins on the attached picture and probably closer to the top pin. If the tree is still there it will be interesting to see how much it has changed in 100 years! North is at the top of the Google picture so, looking at the lighting in your black and white photo, the sun was in the southwest if you really want to try for an accurate recreation. I've attached some notes (source long since forgotten but not my notes) about the cove if you are planning to visit by boat.
You said the photo was taken 100 years ago. The Kodak Brownie hit the market in 1900, so it wasn't necessarily taken with a tripod and large format plate camera. There were plenty of (relatively) compact, portable cameras around by 1926.
I would guess that the majority of 'travel' photography was done with folding bellows roll-film cameras, like some Kodak and Voigtlanders. 35mm was very much a niche market for enthusiasts and the well-off.