PSA Service Pins   90-days (1950's & 60's)   1-year (1950's & 60's)         5-years (1950's & 60's)   10-years (1950's & 60's)             20-years (1960's)                 90-days (1970's & 80's)   1-year (1970's & 80's)         3-years (1970's & 80's)   5-years (1970's & 80's)         10-years (1970's & 80's)   15-years (1970's & 80's)             20-years (1970's & 80's)