Help identifying these pistons

That looks Like a very faint hint of an F before the .030 marking> You may want to try a little Dyekem or Prussian Blue and rub it in to see if it shows, but it looks like every TRW forging I have ever seen by its markings. It appears to have extrusion lines under the head, and the numbers inside look to be coined in place.
I'm not seeing it, and I'm on 3, 32 inch monitors?