Mallosi grading question

hi all
ok i think my 172 kit is graded a it has an a on the piston crown but also looks like an m

the barrell has an a with some code numbers on it also on the bottom of it
so is it an a grade ?

as i need new rings which would be the best ones to get as they go in 2thou increases

many thanks

jas

here. [;)]

Checked an old SIP catalog, and A,B,C, & H rings all have the same nr!
Leif
[:dance1:]

Hi,
the rings have most likely the same dimensions exept for the end gap.
No reason or gain for using other then „a“ rings to an „a“ piston.

Leif
[:dance1:]