Military etiquette questions

You guys know a lot about military etiquette. I have a couple of questions:
1. My father was a Captain in the US Navy. When he died he left me some cufflinks with Navy stuff on them. Is it proper or acceptable for me to wear them with civilian clothing(I have never been in any military service)?
2. From whom (rank)would a US Navy Master Chief receive orders and to whom (rank) would he distribute these orders?
Thanks.
1. My father was a Captain in the US Navy. When he died he left me some cufflinks with Navy stuff on them. Is it proper or acceptable for me to wear them with civilian clothing(I have never been in any military service)?
2. From whom (rank)would a US Navy Master Chief receive orders and to whom (rank) would he distribute these orders?
Thanks.