Quote Originally Posted by Toolmaker51 View Post
Anyone notice what isn't in the photo, in concert with non-disclosure what they're for?

Have an inkling the piston domes had some revolutionary contours.
The casting profile indicates the pistons could be Continental, The statement of aircraft or jeep is a dead giveaway though as Continental made both Air cooled aircraft engines and water cooled vehicle engines additionally continental was and is famous for long full skirted pistons As for the missing crown views if Continental they would be flat tops with possibly having reliefs cut for valve clearances, also depending on if machined for aircraft or vehicle usage.
The pistons in the video are for a diesel engine and could be for just about any brand as many at one time or the other have used the offset precombustion chamber