Q: My father worked approximately nine years for the Postal Service as a rural mail carrier in the 1960s. He was employed both part time and full time, and he did not take a pay out upon leaving the post office.  How might he find out his dates of service and whether he has a deferred annuity? A: His records are stored in the National Personnel Records Center, located in St. Louis, Mo. The instructions for getting that information will be found at www.archives.gov/st-louis/civilian-personnel/index.html#. Once he has that information, he can complete OPM Form 1496A, Application for Deferred Retirement, available at www.opm.gov/forms/pdf_fill/opm1496a.pdf, and…