Reading Piston Tops

BigSky

Anyone know what the readings on this piston may mean?  

BigSky

I think I found some answers....

Ric West IN

D is the code for piston diameter. 10/3 is the weight in oz. or 10 and 3/4 oz.
Pistons are numbered as to which cylinder the piston was originally installed.  The 3 digit number should match the 1st 3 digits of the motor number . Making sure the pistons were installed in the correct block.  This info from my 1942-1947 shop manual.

Hudson_in_Seattle

obviously, someone fed a whole bunch of old movable type into the intake - glad they shot out the exhaust . . . and hopefully someone has the real answer!