| SR4 |
USS Mallard |
 |
USS Mallard ASR 4 (Date Unknown) (Contributed By Donald Taber) |
 |
USS Mallard ASR 4 (Date Unknown) (Contributed By Donald Taber) |
 |
USS Mallard ASR 4 (Date Unknown) (Contributed By Donald Taber) |
 |
USS Mallard ASR 4 (Date Unknown) (Contributed By Donald Taber) |
