very cool.i haven't been able to secure a good stash of kai blades.got 10 or so.but if i use them too much i will neglect the good gillette blades i have an abundance of..
thank you.yes,flat bottom new,there is also a nacet brand version..a later version was available during the 60s wearing the nacet brand label as well,it was based on the brit 60's tech with zamak cap.
i had one of those slim handles on you fb tech.quite rare.i believe mine was in a 1950 ish set.i thought it was aftermarket at first but found other sets with the same handle.
This morning fired up my '56 Red Tip with a vintage Gillette Spoiler blade. Perfect mix of smoothness and efficiency.