Here is a set of 12 NOS Pistons for the Lincoln v12.  The box is marked 06H and std. I get 2.872 when measuring them with a caliper which I believe would make them standard for the 292.  They have some light surface rust in spots as shown.  They are dirty and have some shelf wear from sitting around for decades.  The box is pretty rough. These are cast steel.  The pictures tell the story.

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