None of those indicate a USN officer rank. Some might indicate some enlisted man's rank...but "SN" is often used to indicate SERIAL NUMBER and after the Vietnam War, it meant "SOCIAL SECURITY NUMBER." Today often termed SSN; but those letters can also mean NUCLEAR SUBMARINE (SS=Sub, N=Nuclear).
No sn data
Try the sn tables at Proofhouse.com
ted William mod 100 #v136891
Between September 1943 and January 1944.
a part of the sn
Part of the sn.
Social Networking
"SN" usually means "Side Note". "ASN" usually means "Another Side Note".
It can be part of the sn, it can mean experimental, it can mean duplicate.
Proofhouse.com has Colt sn data.
Stop sign
Matt Hall
SN usually stands for Screen Name. More recently, it stands for "side note".
Text home soon mate !
If you mean what is zac efrons sign, its libra
I contacted Mercury Marine outboard division and they answered within a week. Very good response.