[Spridgets] MOWOG Pistons

[William McLeod]

I have some used pistons, slightly dished, stamped MOWOG 2013, which  
are 2.541 inches (64.55 mm) diameter, 4 ring.  The distance from the  
pin center to the top is (as best I can measure) 1.00 inches.  They  
take circlips.  I am used to finding an AE part number on the inside,  
but these have no recognizable number, just a couple of 3 character  
groups cast in.  Can someone point me toward a resource, or perhaps  
just tell me what they are?  Judging from where my used parts have  
been in their previous lives, I am guessing that these are 1098 std  
pistons.  TIA Bill