How Read Dataplate MAG

[MoonlightVFR]

I need info on reading, understanding Data Plate of Bendix Magneto

The RIGHT mag on this 0-300 Continental engine is Bendix s.n 519398, mfg p.n. 10-51365-1, Model S6LN-21

At the right side of dataplate there is a steel stamp T and slightly to the right is data plate title CHG. What does the T denote? What does CHG mean?


I ask these questions because the LEFT Mag is also a model S6LN-21, s.n. 458729 p.n. 10-51365-1 but on the right side there is a steel stamp S-R next to a title rev.


So my question is what is S-R and T from the data plates informing us?

Regards

[c170b53]

http://www.aircraftmagnetoservice.net/# ... chart/c44r might help

[MoonlightVFR]

Indeed it did help

I am less ignorant now.