Sorry, no joy. 1938 is very sparse. Mine is not listed either but came from a WW II Navy Vet.
712496 070644 SMALL CRAFT TRNG CTR SAN PEDRO 571208
712706 021044 USN 670618
712813 101243 USN - BALTIMORE 510327
713109 060144 USN - HONOLULU 592821
713422 010844 NY NAVY YD 691734
713422 031344 USS WILKES 650734
713534 032343 USS PC-451 648848
713808 071542 USN - BOMBING SQDN 3 570724
713809 071542 USN - BOMBING SQDN 3 570725
713810 071542 USN - BOMBING SQDN 3 570726
713811 071542 USN - BOMBING SQDN 3 570727
713813 071542 USN - BOMBING SQDN 3 570729
713816 071542 USN - BOMBING SQDN 3 570732
713819 071542 USN - BOMBING SQDN 3 570735
713832 071542 USN - BOMBING SQDN 3 570748
713839 071542 USN - BOMBING SQDN 3 570755
713840 071542 USN - BOMBING SQDN 3 570756
/Ken Hill
"Reason is not automatic. Those that deny it cannot be conquered by it!" Ayn Rand