I will do this in several post in order to include images. Here is what I think about the seat castings:
Ist K, Seat casting did not have the fender strut supports as part of the casting. Strut supports were welded on. Believe these were only used in early 52. Initial castings had threaded downtubes, later ones used the hold down plate for the seat springs etc.
- Snipped Early K Frame Welded Strut Support Threaded Downtube 1.JPG (146.87 KiB) Viewed 15112 times
- Snipped Early K Frame Welded Strut Support Threaded Downtube 2.JPG (133.75 KiB) Viewed 15112 times
- Snipped Early K Frame Welded Strut Support Threaded Downtube 3.JPG (184.14 KiB) Viewed 15112 times