I'm always scanning eBay for interesting or unusual rocketry related items and recently came across this motor on eBay. I've seen other interesting things before like this small sounding rocket that I saw last year. Occasionally something really interesting shows up like this composite motor I saw last week. Unfortunately I didn't win this auction, but at least the pictures are kind of cool. The description said that the motor had been acquired from Douglas Aircraft some years ago. the overall length is 60" and the diameter is approximately 18". The tag had the following info on it:
P/N AG659-61370 QTT3 #1, Owner-NASA, 6-25-69
Pressure Calibration System
T4 Change, Model DSV4B-1-1
