My rubber stamp was purchased in 1985 so I guess it's 36 years old. It had a corner that tore off and I glued it back with rubber cement. That was about 2005. A lot of the detail is worn, but the name and registration number is still visible.
But with a disclaimer: It has stayed in a drawer for probably 15 years. Everything I do now is exclusively a digital stamp.
LS stamp since about 1988, but I'm on the second one and about due to get number three
PE stamp since 1980 still in fine condition. Somewhere I have the clamping style embossed stamp for the PE but have used it only once when providing a reference for an engineer applying to another state and that was their requirement.
My first rubber stamp is now 23 years old. I doubt that I have rubber stamped half that many documents. It's at home in a closet right now. I'm on my third ink pad, the first two simply dried up from old age.
My first rubber "stomp" (because that's what you had to do to it to make an even impression) I bought in 1972. I got tired of cleaning the gooped up ink out from between the letters and finally ordered one of them thar fancy with-the-built-in-pad jobbers (2000PLUS printer R 50). It took about five years to run out of ink, but can easily be re-inked.
36 years, still have the stamp and the crimp.
Almost never use either, but the last time I did the stamp worked great.