Here is a set of 4 patches:
USS Florida SSBN 728 (Hat style with dolphins)
USS Puffer SSN 652 (hat style)
USS Puffer SSN 652 Ships Shield
Russian Akula "volk" crest
US Navy Saubmarine Dolphins (replica)
US Navy Ballistic Missile Pin (replica)
All are new and will ship for $6 to a good home.