1G Anyone recognize these pistons?

[97egl]

I bought an entire semi trailer of 4g63/DSM related parts about a year ago. Found these pistons with no markings but there's only 3. They have quite a dome to them and the rings are about 1/2 the thickness of factory rings. I doubt I can buy just 1 even if I can figure out who makes them but figured it's worth a shot. Someone put them on stock rods but they have a spot for a circlip so they are supposed to be floating pistons

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[curt-s]

Nope but I wanna see this trailer full of parts

 

[BLACK'98DSM]

They sort of look like Diamond or Arias pistons, but those always have engraving/etching markings on them. With no marking it's hard to tell. I'm sure there's been tons of 4g63 pistons produced over the years. They definitely aren't JE pistons.

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[97egl]

Nope but I wanna see this trailer full of parts

The trailer didn't come with so after 4 trips with my truck and car trailer parts are strewn all over my garage, shed, and friends garage a year later. And then that's on top of all the parts I've collected over the past 10 years. It was probably not one of my wiser purchases but nobody would give the guy a decent price for everything and he was being forced to clean up by the city so it was close to ending up in the scrap yard and I couldn't let that happen. So now I'm trying to pick through it all and figure out what's good and bad and what I can use and what I need to sell. So there will probably be more posts like this asking if anyone knows what things are