United States Navy Petty Officer 1st Class Rank Insignia Patch E6, Postal Clerk

A Petty Officer First Class is the third of the Navy's Petty Officer grades, and serves as a non-commissioned officer. A Petty Officer First Class serves both as a leader and as a technical expert, and all Petty Officers have a specified rating, or job. The exact title with which a petty officer is addressed depends on their specialty; a Petty Officer First Class serving as an Electronics Technician, for example, would have the full title of Electronics Technician First Class.
Petty Officer First Class is the 6th rank in the United States Navy with a grade of O-6, ranking above Petty Officer Second Class and directly below Chief Petty Officer.

Postal clerk (abbreviated as PC) was a United States Navy occupational rating.

Postal clerks:
    Operate US Navy post offices
    Supervise, organize and establish or disestablish a US Navy post office
    Perform postal counter work, including sale of stamps and money orders
    Process incoming and outgoing mail
    Route mail
    Maintain a mail directory
    Process official mail
    Maintain security of postal effects and mail matter
    Process claims and inquiries
    Prepare and file postal correspondence, records and reports
Merged into Logistics specialist on 1 October 2009, effective on 1 January 2010. The logistics specialist (LS) is a US Navy enlisted rating that was created on 1 October, 2009 by the merger of the storekeeper (SK) and postal clerk (PC) ratings. It also included the previous functions of the former aviation storekeeper (AK) rating, which was previously merged into the former storekeeper (SK) rating on 1 January 2003.

Original Fabric Insignia patch with black backing and silver and red embroidery.