It must be a while since this ex US Army Kiowa landed on this mobile pad. The serial is on the cowling- O-16921, so it has a part of 68-16921, but the TDB is readable and is 68-16839. It's dumped in the middle of Pasa Robles MAP, CA.

Actually, I only noticed the TDB doing this pic. It is just behind the top right hand corner of the rear door.

Done