There are 5 Texas Helicopter OH-13H/M74A aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1978 and 1979.
N10009
1979 Texas Helicopter Corp OH-13H/M74A
Rochelle, IL
N1001F
1979 Texas Helicopter Corp OH-13H/M74A
Cheyenne, WY
N1201Y
1979 Texas Helicopter Corp OH-13H/M74A
Hamilton, MI
N51853
1978 Texas Helicopter Corp OH-13H/M74A
Saint Cloud, MN
N51860
Texas Helicopter Corp OH-13H/M74A
Nickerson, KS