Master Chief Petty Officer of the Navy badge Wikipedia
The Master Chief Petty Officer of the Navy badge is an identification badge of the United States Navy which is presented to the Master Chief Petty Officer of the Navy upon assuming office. The Master Chief Petty Officer of the Navy badge is the highest in a series of chief petty officer identification badges. Originally, the full-size badge was worn on the lower left pocket below all awards and warfare pins. Effective 1 October 2004, the badge was moved to the wearer's right, above the shirt pocket, and the miniature version of the badge replaced the full-size badge, to be more in line with where commanding officers wear their command-at-sea pin. NAVADMIN 274/06 effective 25 September 2006 returned the full-size badge to its original position.
Because the Master Chief Petty Officer of the Navy badge is considered an identification pin, there are no additional criteria for its issuance other than the wearer hold the office of MCPON. It is typically not issued as an award on a DD Form 214 but, as the office of MCPON is normally a terminal assignment, the Master Chief Petty Officer of the Navy badge is normally included as a decoration in retirement shadow boxes.