picked this up recently, had a 10 ratti nagas of narwar, but this one is a 20 ratti. Nagas of Narwar Ganapati Naga 4th Century AD Mitchiner ACW 4742+ Obverse: Humped bull standing left. in dotted border Reverse: In Brahmi:'Maharaja Sri Ganendra'. 9 mm 1.9g Provenance: Ex Mctears lot, UK here's a picture with my nice 10 ratti on the left. note they are the same size. one of you guys mentioned that the difference in the denominations was the width, and not the diameter. that is certainly the case. here is the side shot.. the coin on the left is 1.0g, so the thickness (edge size...what the term????) is twice that of the 10 ratti. i originally bid on this as a secret santa gift, but i ended up winning the auction for 1.98 including shipping. felt cheap mailing it off, so just kept if for myself.
It's allegedly Brahmi script, but I don't know how to read the letters, and I suspect a significant portion of the lettering is off-flan.
You normally need a dozen for a complete transcription. But to give you guys some idea, here a really good one issued under the rule of Devanaga: