Found it, listed ca.1977 --- N75070
PT-13D Stearman 42-16966 (USAAF contract)
to
U.S.Navy N2S-5 BuNo. 61157 (or if you prefer 061157) Kaydet
Eventually to Civil registry as Boeing E75 c/n 75-5129
1977 owner: Lyon Flying Service Welsh, Louisiana.
Last USCAR entry as: N7684M cancelled 23 Feb 2011
John
Data from FAA fiche dated 04/77 sorted by code & serial-number