Needed application and size for Wiseco 1013RS L Ring

[Mark Loraine]

Wondering if anyone has the Wiseco piston application chart for the old green envelope piston ring number 1013RS I have on-hand.
I am looking for the size of the ring primarily and engine application after.
These will be in the Foreign section.

Ultimately, I need a ring to fit a 50.10 mm Sirio piston I have for my ATK/Atomik Reed 100 cc engine.
Bore size as I recall was 50.18 mm at the top ridge.

I'd take 2 if anyone has them, but lets get the application of the above mentioned ring first please.

Thank You,

Mark L. / SWNY