Rye Field have given this kit their standard Early Tiger cupola part. It has many fine details, including drain holes equally spaced around the rim (arrowed here).
But Tiger "V1", seen in this photo, had the first, unique cupola. Its drain holes were directly above its vision slits. That would cause rainwater to obscure vision. The error must have been immediately realised because photos of the first production Tigers show the holes moved.
You can improve accuracy of this kit by filling Rye Field's drain openings and drilling new ones as in the photo.