BALL END GILLETTE AGE?

Getting into vintage Gillette razors and can't find when Gillette introduced the ball end on thier razors.
Also, what is the bulldog handle.
Thanks for any info

since the year dot..

gillette had ball end old-types, NEWS and techs. to which model are you refering to?

a bulldog handle is usually a fatter handle than normal.

Thanks for the reply
It's the 102