help needed to I.D. hemi pistons

I've been looking for a set of pistons for my 354 build. I found set of early hemi pistons L2061.I'm guessing by the # that they are trw? Does anyone happen to know what the are?

 

I saw those same pistons for sale and the first thing I thought of was "TRW part number". As a matter of fact I was googling L2061 cross referenced with TRW and this is the first hit I got. Sorry I'm not more helpful.

 

I tried googling them too. Never did find anything. Just went ahead and bought a set of new ones.