yes, every car AFTER 3254 should have square corner doors (with the exceptions noted below). I said that at the beginning of the thread. It's a positive sign that the car after this one is also square cornered. As I indicated, I believe this to be one of the earliest examples with square cornered doors and hood.
The info comes from Alpine parts list publication # 6600992 page YX3 which lists changeover on hood and doors at B9473254 except for 3268, 3271-3273, 3276-3279, 3289-3291, and 3384. I have found in 40 years that exact documentation for parts supersessions are not aways accurately reflected in factory parts books and should usually be taken only as a general guide.
This further illustrates the complication of having one company make the bodies (pressed steel), another turning the shells into Tigers (Jensen) and a third one at the end finishing off the cars (Rootes). it's certainly possible, and likely probable that Pressed Steel was setting up for the new square cornered transition body and several escaped onto the line resulting in an overlap of both types early on.
As I indicated earlier in the thread, I was NOT suggesting that the car was rebodied, it was just before the Rootes indicated change point.